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Car Forum / Honda Cars / April 2009

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Can you "feel" a difference after a regular oil change?

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Big Al - 26 Apr 2009 12:53 GMT
Is it possible to feel a difference (smoothness, better acceleration,
etc.) after a normal-interlude oil change?  Someone is claiming this and
I think it's just their imagination, but I was wondering if there'd be
any technical reason.  I can't think of one, unless the oil was quarts
low or something drastic, which it wasn't.

Thanks--
Al
tww1491 - 26 Apr 2009 13:26 GMT
> Is it possible to feel a difference (smoothness, better acceleration,
> etc.) after a normal-interlude oil change?  Someone is claiming this and
[quoted text clipped - 4 lines]
> Thanks--
> Al

Strictly imagination.  Of course, perhaps that would be the case if you
never performed the required maintenance on time.
Sharx35 - 27 Apr 2009 12:31 GMT
>> Is it possible to feel a difference (smoothness, better acceleration,
>> etc.) after a normal-interlude oil change?  Someone is claiming this and
[quoted text clipped - 7 lines]
> Strictly imagination.  Of course, perhaps that would be the case if you
> never performed the required maintenance on time.

Just like after a thorough car wash.
News - 27 Apr 2009 12:39 GMT
>>> Is it possible to feel a difference (smoothness, better acceleration,
>>> etc.) after a normal-interlude oil change?  Someone is claiming this and
[quoted text clipped - 9 lines]
>
> Just like after a thorough car wash.

Or a new set of JDM "speed" decals...  ;-)
Fat Moe - 26 Apr 2009 14:00 GMT
> Is it possible to feel a difference (smoothness, better acceleration,
> etc.) after a normal-interlude oil change?  Someone is claiming this and
[quoted text clipped - 4 lines]
> Thanks--
> Al
Not unless someone noticed a loose plug wire and stuck it back on or
something like that .....
jim beam - 26 Apr 2009 15:26 GMT
> Is it possible to feel a difference (smoothness, better acceleration,
> etc.) after a normal-interlude oil change?  Someone is claiming this and
[quoted text clipped - 4 lines]
> Thanks--
> Al

of course you could, although it really depends on the state of the old
oil.

usually, oil goes up in viscosity as particle load increases with age,
so the engine will be having to work very slightly harder against that.
 you'd not expect a big difference on changing to fresh, but it can be
there.  i doubt that recreational oil changers that compulsively do it
every 2k miles will notice anything.
jim beam - 26 Apr 2009 16:04 GMT
>> Is it possible to feel a difference (smoothness, better acceleration,
>> etc.) after a normal-interlude oil change?  Someone is claiming this
[quoted text clipped - 13 lines]
> there.  i doubt that recreational oil changers that compulsively do it
> every 2k miles will notice anything.

http://www.bishopsperformance.com/dynoinfo.htm

this is not a great link, but it's quick.

"Another little known fact is that the type and weight of oil can affect
the power as well.  Pure synthetic oil can easily show a 1% - 3%  or
greater increase in horsepower compared to conventional petroleum based
oil."

the same applies for older more viscous oil.
Edward W. Thompson - 27 Apr 2009 07:36 GMT
>> Is it possible to feel a difference (smoothness, better acceleration,
>> etc.) after a normal-interlude oil change?  Someone is claiming this and
[quoted text clipped - 13 lines]
>there.  i doubt that recreational oil changers that compulsively do it
>every 2k miles will notice anything.

What a complete lot of nonsense.  If the lubricity of the oil changes
in any perceptable degree, the engine bearings will fail.  Particle
entrainment in the oil does not increase viscosity.  Incidentally
where are these particles coming from?  Surely you are not suggesting
these are metallic particles from engine wear.  Where do you people
get their technical education from?
jim beam - 27 Apr 2009 13:54 GMT
>>> Is it possible to feel a difference (smoothness, better acceleration,
>>> etc.) after a normal-interlude oil change?  Someone is claiming this and
[quoted text clipped - 15 lines]
> What a complete lot of nonsense.  If the lubricity of the oil changes
> in any perceptable degree, the engine bearings will fail.

you've worked with cars for /how/ long???

> Particle
> entrainment in the oil does not increase viscosity.

how odd - when you /measure/ viscosity over time, if the base doesn't
degrade, viscosity goes up!  strange how misleading measurements can be!

> Incidentally
> where are these particles coming from?

er, it's called "combustion product".  ever heard of that in a
"combustion engine"?

> Surely you are not suggesting
> these are metallic particles from engine wear.

there's all kinds of crap in there.  anything too small for the filter
remains in the oil.  duh.

> Where do you people
> get their technical education from?

clearly a much better place than you.
Edward W. Thompson - 28 Apr 2009 06:53 GMT
>>>> Is it possible to feel a difference (smoothness, better acceleration,
>>>> etc.) after a normal-interlude oil change?  Someone is claiming this and
[quoted text clipped - 40 lines]
>
>clearly a much better place than you.

So long as you have satisfied yourself you are correct that is the end
of the matter no matter how wrong you happen to be.

As an aside, take a glass of water and add a teaspoon full of sand to
it.  Shaker it.  Does viscosity change?  No?  I wonder why given you
believe entrained matter changes viscosity.  Incidentally viscosity
and lubricity are two separate characteristics.

Combustion products in engine oil are entrained matter although some
oxidation does occur which does not adversely affect lubricity or
viscosity.  What does get depleted in engine oil are additives which
are the principal reason for oil change.

On the matter of combustion products, provided the diameter of the
products do not exceed oil film thickness they will do no harm and
will be removed by the filter.  Combustion products in the oil of a
well maintained gas engine are minimal as compared to a trunk piston
diesel engine.
jim beam - 28 Apr 2009 13:49 GMT
>>>>> Is it possible to feel a difference (smoothness, better acceleration,
>>>>> etc.) after a normal-interlude oil change?  Someone is claiming this and
[quoted text clipped - 40 lines]
> As an aside, take a glass of water and add a teaspoon full of sand to
> it.  Shaker it.  Does viscosity change?  No?

<snip bull>

wow, i love this guy!  facts simply don't get in your way, do they!
what's next, mud is the same viscosity as water?  'cos that's the way
/your/ example works buddy.

you need to go back to your old high school and have a word with your
old science teachers - they failed you big time.
Clive - 28 Apr 2009 14:12 GMT
>Combustion products in the oil of a
>well maintained gas engine are minimal as compared to a trunk piston
>diesel engine.
What is a trunk piston diesel engine?
Signature

Clive

Jeff - 29 Apr 2009 02:23 GMT
> In message <vfadnSGpkPlbBGvUnZ2dnUVZ8redn...@bt.com>, Edward W. Thompson
> <thomed...@btopenworld.com> writes>Combustion products in the oil of a
[quoted text clipped - 4 lines]
> --
> Clive

Is that a diesel engine in a rear-engine or mid-engine car?

Perhaps he meant "truck diesel engine."
Clive - 29 Apr 2009 02:33 GMT
In message
<aa14ffda-52b3-41fe-bcbd-13bbc774a7f5@z16g2000prd.googlegroups.com>,
Jeff <jeff.utz@gmail.com> writes
>> What is a trunk piston diesel engine?
>> --
[quoted text clipped - 3 lines]
>
>Perhaps he meant "truck diesel engine."
I've googled for it, it just means normal pistons as in any i.c. engine
instead of a thin piston driving a piston rod to a crosshead as in steam
engines.
Signature

Clive

Tegger - 26 Apr 2009 15:31 GMT
Big Al <big@big.com> wrote in news:big-820E48.07530926042009
@freenews.netfront.net:

> Is it possible to feel a difference (smoothness, better acceleration,
> etc.) after a normal-interlude oil change?  Someone is claiming this and
> I think it's just their imagination, but I was wondering if there'd be
> any technical reason.  I can't think of one, unless the oil was quarts
> low or something drastic, which it wasn't.

No alterations will be felt simply by the fact of the oil change.

Psychologically though, some may feel as though the car is running better
because they've done something "good" for the car.

Signature

Tegger

The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/

jor - 26 Apr 2009 15:31 GMT
> Is it possible to feel a difference (smoothness, better acceleration,
> etc.) after a normal-interlude oil change?  Someone is claiming this and
[quoted text clipped - 4 lines]
> Thanks--
> Al

Of course you can! Just like after a nice wash and wax. Everything is
smooth and powerful. At least, that's the way it is with me.
jor
Tony Hwang - 26 Apr 2009 15:54 GMT
> Is it possible to feel a difference (smoothness, better acceleration,
> etc.) after a normal-interlude oil change?  Someone is claiming this and
[quoted text clipped - 4 lines]
> Thanks--
> Al
Hi,
Yes for sure.
Hachiroku ハチロク - 26 Apr 2009 16:02 GMT
>> Is it possible to feel a difference (smoothness, better acceleration,
>> etc.) after a normal-interlude oil change?  Someone is claiming this and
[quoted text clipped - 6 lines]
> Hi,
> Yes for sure.

I notice the engine runs a little smoother with fresh oil.
Fat Moe - 26 Apr 2009 16:11 GMT
>>> Is it possible to feel a difference (smoothness, better acceleration,
>>> etc.) after a normal-interlude oil change?  Someone is claiming this and
[quoted text clipped - 8 lines]
>
> I notice the engine runs a little smoother with fresh oil.

 Main thing I notice is the used oil kills the weeds along the fence.
  Here's some reading for ya,
$10 Million, Just for Motor Oil
The most advanced piece of technology in a Nascar vehicle these days
isn't its engine, its suspension or anything made of carbon fiber. It's
the motor oil.
http://online.wsj.com/article/SB123932274269507173.html
Hachiroku ハチロク - 26 Apr 2009 16:19 GMT
>>>> Thanks--
>>>> Al
[quoted text clipped - 4 lines]
>>
>   Main thing I notice is the used oil kills the weeds along the fence.

I notice if you lived where I live, you'd have to pay a hefty fine and
clean it up at enormous expense...
Fat Moe - 26 Apr 2009 17:15 GMT
>>>>> Thanks--
>>>>> Al
[quoted text clipped - 6 lines]
> I notice if you lived where I live, you'd have to pay a hefty fine and
> clean it up at enormous expense...

It's OK here, and it works great as termite preventer.   I
"scientifically" applied a few gallons to a section of fence with a
Wagner spray gun and no termites on that section after 15 years, they
went through the rest like a buzz saw.  Neighbor thought I was running a
tattoo gun and came over to see what kind of rig I was running.
ron - 26 Apr 2009 17:41 GMT
When I was a kid and we had to put in new fence posts, we routinely soaked
the bottom foot or so in old drain oil.  Did that now I'd be in jail.  And
no, I've never noticed anything after an oil change as far as performance.
But I seldom go as far as 4000 miles as I prepayed for 3000/3month "free"
lifetime oil/filter changes.

Ron in Idaho
Tony Hwang - 26 Apr 2009 19:37 GMT
>>>> Is it possible to feel a difference (smoothness, better
>>>> acceleration, etc.) after a normal-interlude oil change?  Someone is
[quoted text clipped - 15 lines]
> the motor oil.
> http://online.wsj.com/article/SB123932274269507173.html
Whoa!
You do what? I hope you are not using used oil to kill weeds.
That is against the law for sure and BAD thing to do for the environment.
jim beam - 26 Apr 2009 19:40 GMT
>>>>> Is it possible to feel a difference (smoothness, better
>>>>> acceleration, etc.) after a normal-interlude oil change?  Someone
[quoted text clipped - 19 lines]
> You do what? I hope you are not using used oil to kill weeds.
> That is against the law for sure and BAD thing to do for the environment.

have you ever been to la brea tar pits?
Tony Hwang - 26 Apr 2009 19:43 GMT
>>>>>> Is it possible to feel a difference (smoothness, better
>>>>>> acceleration, etc.) after a normal-interlude oil change?  Someone
[quoted text clipped - 21 lines]
>
> have you ever been to la brea tar pits?
Hi,
Have you been to oil sand tiling pond?
jim beam - 26 Apr 2009 19:49 GMT
>>>>>>> Is it possible to feel a difference (smoothness, better
>>>>>>> acceleration, etc.) after a normal-interlude oil change?  Someone
[quoted text clipped - 24 lines]
> Hi,
> Have you been to oil sand tiling pond?

no, but i've been to the tar pits and they're rank.  my point is, while
i don't think it's a good idea to wantonly spread oil anywhere, nature
does a pretty good job of spreading that stuff about on its own.
News - 26 Apr 2009 17:49 GMT
>>> Is it possible to feel a difference (smoothness, better acceleration,
>>> etc.) after a normal-interlude oil change?  Someone is claiming this and
[quoted text clipped - 8 lines]
>
> I notice the engine runs a little smoother with fresh oil.

I notice my wallet is lighter.
Hachiroku ハチロク - 26 Apr 2009 18:24 GMT
>>>> Is it possible to feel a difference (smoothness, better acceleration,
>>>> etc.) after a normal-interlude oil change?  Someone is claiming this and
[quoted text clipped - 10 lines]
>
> I notice my wallet is lighter.

That's for sure.
Big Al - 27 Apr 2009 22:07 GMT
> > Is it possible to feel a difference (smoothness, better acceleration,
> > etc.) after a normal-interlude oil change?  Someone is claiming this and
[quoted text clipped - 6 lines]
> Hi,
> Yes for sure.

Well, not being a mechanic, I would've guessed the engine is controlled
by a tightly timed ignition system rather than how lubricated the engine
is.  

Al
Gary L. Burnore - 27 Apr 2009 22:45 GMT
>> > Is it possible to feel a difference (smoothness, better acceleration,
>> > etc.) after a normal-interlude oil change?  Someone is claiming this and
[quoted text clipped - 10 lines]
>by a tightly timed ignition system rather than how lubricated the engine
>is.  

Mine runs better just after it's washed and even better if I get it waxed too.
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SMS - 26 Apr 2009 18:14 GMT
> Is it possible to feel a difference (smoothness, better acceleration,
> etc.) after a normal-interlude oil change?

No.

> Someone is claiming this and
> I think it's just their imagination, but I was wondering if there'd be
> any technical reason.  I can't think of one, unless the oil was quarts
> low or something drastic, which it wasn't.

People claim a lot of things. I.e. they claim they can feel the
difference between synthetic base stock oil and petroleum base stock
oil, but of course they can't.
jim beam - 26 Apr 2009 18:18 GMT
>> Is it possible to feel a difference (smoothness, better acceleration,
>> etc.) after a normal-interlude oil change?
[quoted text clipped - 8 lines]
> difference between synthetic base stock oil and petroleum base stock
> oil, but of course they can't.

except that you can measure the difference on a dyno.  1-3% in not
trivial.  that means you'll be a cars length ahead of the guy that
started beside you by the end of the block.
Jeff - 26 Apr 2009 18:34 GMT
> >> Is it possible to feel a difference (smoothness, better acceleration,
> >> etc.) after a normal-interlude oil change?
[quoted text clipped - 12 lines]
> trivial.  that means you'll be a cars length ahead of the guy that
> started beside you by the end of the block.

A car's length? It would be hard to feel the difference in
acceleration. Plus, you would have to floor it to feel the difference.

No, it's one's imagination.

Jeff
jim beam - 26 Apr 2009 18:44 GMT
>>>> Is it possible to feel a difference (smoothness, better acceleration,
>>>> etc.) after a normal-interlude oil change?
[quoted text clipped - 15 lines]
>
> Jeff

not good at math - are you.
SMS - 26 Apr 2009 19:17 GMT
> A car's length? It would be hard to feel the difference in
> acceleration. Plus, you would have to floor it to feel the difference.
>
> No, it's one's imagination.

What's rather amusing is that even companies like Exxon-Mobile have
never claimed, nor of course proven, an increase in MPG from synthetic
base stock oil. Of course you see claims all over the map from Amsoil's
multi-level-marketing distributors.

Of course there are benefits to synthetic base stock oil in some
circumstances, such as extremely cold climates. For most people,
synthetic is simply throwing money away, other than the fact that it
makes them feel good by believing they are doing something good. It's
rather like a religion.
jim beam - 26 Apr 2009 19:23 GMT
>> A car's length? It would be hard to feel the difference in
>> acceleration. Plus, you would have to floor it to feel the difference.
[quoted text clipped - 4 lines]
> never claimed, nor of course proven, an increase in MPG from synthetic
> base stock oil.

er, yes they have.  that's why they have "economy" branded blends.

> Of course you see claims all over the map from Amsoil's
> multi-level-marketing distributors.

of course, because amsoil marketeers are f.ck-heads, that means all the
technology of all other companies is bogus!

> Of course there are benefits to synthetic base stock oil in some
> circumstances, such as extremely cold climates.

but you just said that there's no such thing as better economy.  you
/do/ know that economy and viscosity, what affects cold starting, are
related don't you???  oh, wait, maybe you didn't.

> For most people,
> synthetic is simply throwing money away, other than the fact that it
> makes them feel good by believing they are doing something good. It's
> rather like a religion.

yup.  and remaining fiercely ignorant is a fabulous way to go through life.
Jeff - 26 Apr 2009 19:31 GMT
> > A car's length? It would be hard to feel the difference in
> > acceleration. Plus, you would have to floor it to feel the difference.
[quoted text clipped - 5 lines]
> base stock oil. Of course you see claims all over the map from Amsoil's
> multi-level-marketing distributors.

They don't? Look here: <http://www.mobiloil.com/USA-English/MotorOil/
Oils/Mobil_1_FAQs.aspx#FAQs1>

> Of course there are benefits to synthetic base stock oil in some
> circumstances, such as extremely cold climates. For most people,
> synthetic is simply throwing money away, other than the fact that it
> makes them feel good by believing they are doing something good. It's
> rather like a religion.

Actually, if there is less friction, there is better fuel economy.

And to meet the oil standards set by the API, the oil has to save
fuel. And, the engine will last longer.

Overall, though, the savings are small and only a small percentage of
people will actually have their cars long enough to benefit from a
longer-lasting engine. Most people sell their cars well before this or
the cars have other problems, like that a crash, that ends the service
of the car.

Jeff
SMS - 26 Apr 2009 19:45 GMT
>>> A car's length? It would be hard to feel the difference in
>>> acceleration. Plus, you would have to floor it to feel the difference.
[quoted text clipped - 6 lines]
> They don't? Look here: <http://www.mobiloil.com/USA-English/MotorOil/
> Oils/Mobil_1_FAQs.aspx#FAQs1>

They only claim the increased fuel economy for 0W20 and 0W30. Yeah,
since it's not possible to make a 0W20 or 0W30 with petroleum base
stock, they have a point there. But even for the "Advanced Fuel Economy"
products, they keep going back to "during warm up" every time they make
a claim of reduced friction or "saving" energy.

"During warm-up, Mobil 1 Advanced Fuel Economy flows faster because of
its lower viscosity to minimize metal to metal contact to reduce
friction and wear."

"During the warm up phase, the Mobil 1 fully synthetic formulation
because of its lower viscosity flows more easily through the oil pump,
requiring less energy to pump the oil to the critical engine parts."

"http://www.mobiloil.com/USA-English/MotorOil/Oils/Mobil_1_Advanced_Fuel_Economy.aspx"

But for their "regular" synthetic oil, 5W20 and 5W30, they make no
claims of increased fuel economy.
jim beam - 26 Apr 2009 19:50 GMT
>>>> A car's length? It would be hard to feel the difference in
>>>> acceleration. Plus, you would have to floor it to feel the difference.
[quoted text clipped - 16 lines]
> its lower viscosity to minimize metal to metal contact to reduce
> friction and wear."

you're confused dude.  badly confused.

> "During the warm up phase, the Mobil 1 fully synthetic formulation
> because of its lower viscosity flows more easily through the oil pump,
[quoted text clipped - 4 lines]
> But for their "regular" synthetic oil, 5W20 and 5W30, they make no
> claims of increased fuel economy.

see above.
Jeff - 26 Apr 2009 20:04 GMT
> >>> A car's length? It would be hard to feel the difference in
> >>> acceleration. Plus, you would have to floor it to feel the difference.
[quoted text clipped - 25 lines]
> But for their "regular" synthetic oil, 5W20 and 5W30, they make no
> claims of increased fuel economy.

Really? <http://www.mobil.com/USA-English/Lubes/PDS/
GLXXENPVLMOMobil_1_5W-20.asp>

Are you going to keep backtracking?
jim beam - 26 Apr 2009 20:09 GMT
<snip for clarity>

> Are you going to keep backtracking?

of course he is - he doesn't understand what the heck he's talking about.
SMS - 26 Apr 2009 20:23 GMT
>>>>> A car's length? It would be hard to feel the difference in
>>>>> acceleration. Plus, you would have to floor it to feel the difference.
[quoted text clipped - 28 lines]
>
> Are you going to keep backtracking?

No offense, but you need to learn to read for comprehension. Nowhere do
they make a claim on that page that their 5W20 synthetic base stock
product provides better fuel economy that a comparable 5W20 petroleum
base stock product.

Why don't you show a _single_ independent study that shows a benefit to
most people. Oh, wait, they're aren't any!

After all these years you'd think that there would be at least one
published study that showed a provable benefit in terms of wear, MPG, or
extended change intervals for synthetics uses in non-high performance
engines, operated in moderate climates. But there aren't _any_. There's
anecdotes by users of synthetics, there's claims by companies like
Amsoil which have never been validated, and of course various claims by
MLM people selling Amsoil. Just choose your benefit from one of the
hundreds of MLM web sites!

Of course there probably have been plenty of studies that were done but
not published because they didn't have the results that the company
paying for the study wanted.

It's amusing that not even Mobil, who would have the most to gain by
some evidence of increased fuel economy for synthetics, can make that
claim. All we see is a heavily qualified statement that logically makes
no sense:

"Actual savings are dependent upon vehicle/engine type, outside
temperature, driving conditions, adjusting tire pressure, and your
current engine oil viscosity."

Huh? So adjusting tire pressure affects how well synthetic oil works (as
opposed to how well dino oil performs, LOL). And how does your current
oil viscosity, if it's the same as the viscosity of the synthetic, make
any difference.

So here's what Mobil thinks you should do:

1. Change to a lower viscosity of synthetic base stock oil than the
petroleum base stock oil that you're currently using

2. Drive only in extremely cold temperatures where sythetic has a
benefit at start-up.

3. Adjust your tire pressure, from the previously under-inflated
pressure you had with your petroleum base stock oil, to the proper pressure.

Geez, some people are gullible.
jim beam - 26 Apr 2009 20:28 GMT
<snip for clarity>

> Geez, some people are

<snip>

STOOOOPID.
CharlesTheCurmudgeon - 26 Apr 2009 20:41 GMT
> <snip for clarity>
>
[quoted text clipped - 3 lines]
>
> STOOOOPID.

Far as I'm concerned, SMS is a long-haired maggot-infested dope-smoking FM
type.  If he was called to give professional testimony, as a judge, I'd have
the whole thing stricken from the record as being unreliable.

Charles Grozny
Jeff - 26 Apr 2009 20:35 GMT
> >>>>> A car's length? It would be hard to feel the difference in
> >>>>> acceleration. Plus, you would have to floor it to feel the difference.
[quoted text clipped - 61 lines]
> Huh? So adjusting tire pressure affects how well synthetic oil works (as
> opposed to how well dino oil performs, LOL).

Tire pressure affects fuel economy.

> And how does your current
> oil viscosity, if it's the same as the viscosity of the synthetic, make
> any difference.

If you change from 10W30 regular to 5W20 synthetic vs. changing from
2W20 regular to 5W20 synthetic, you will have a different change in
fuel economy.

> So here's what Mobil thinks you should do:
>
> 1. Change to a lower viscosity of synthetic base stock oil than the
> petroleum base stock oil that you're currently using

Where did they say that?

> 2. Drive only in extremely cold temperatures where sythetic has a
> benefit at start-up.

Where did they say that?

> 3. Adjust your tire pressure, from the previously under-inflated
> pressure you had with your petroleum base stock oil, to the proper pressure.

Where did they say that?

> Geez, some people are gullible.

And some people are just plain stupid. You have GW Bush disease.
SMS - 26 Apr 2009 21:29 GMT
<snip>

> Tire pressure affects fuel economy.

Of course it does, but Mobil is being disingenuous when they claim that
tire pressure has an effect on how well their synthetic base stock oil
performs versus how well a petroleum base stock oil performs. It makes
no difference. You should keep your tires properly inflated no matter
which type of oil you use.

> If you change from 10W30 regular to 5W20 synthetic vs. changing from
> 2W20 regular to 5W20 synthetic, you will have a different change in
> fuel economy.

And if you change from 10W30 petroleum base stock to 5W20 petroleum base
stock you'll see the same change  in fuel economy. Of course you should
not make that change no matter which base stock you're using, but that's
another matter entirely.

Mobil is trying to get people to change multiple variables at the same
time, one of them being the base stock of the oil, then claiming the
increased fuel economy from switching to a lower viscosity oil and
proper tire pressure is due to the change in the base stock.

Even for their "Advanced Fuel Economy" formulation, the increase in MPG
isn't due to the base stock being synthetic, except for the fact that
apparently it's not practical to make a petroleum base stock 0Wxx oil.
Even then, they're hedging their bets, admitting that the advantage is
during start-up, not during normal operation.
jim beam - 26 Apr 2009 21:37 GMT
> <snip>
>
[quoted text clipped - 3 lines]
> tire pressure has an effect on how well their synthetic base stock oil
> performs versus how well a petroleum base stock oil performs.

dude, you have a serious reading comprehension problem.

> It makes
> no difference. You should keep your tires properly inflated no matter
[quoted text clipped - 19 lines]
> Even then, they're hedging their bets, admitting that the advantage is
> during start-up, not during normal operation.

see above.  quit while you're behind.
Clive - 26 Apr 2009 23:03 GMT
>After all these years you'd think that there would be at least one
>published study that showed a provable benefit in terms of wear, MPG,
[quoted text clipped - 4 lines]
>various claims by MLM people selling Amsoil. Just choose your benefit
>from one of the hundreds of MLM web sites!
I used to work for a company that made polymer or synthetic additives to
prolong oil life, I am also old enough to remember when it was normal to
change oil ever 3000 miles, but due to additives now the oil wear is
less, modern oils allow for annual changes or up to 20,000 miles between
changes, that's what synthetics are all about.
( Yes it wears out due to the shear forces in an engine chopping up the
long chain molecules into shorter runnier ones, lowering it's viscosity
and therefore protection.)
Signature

Clive

SMS - 27 Apr 2009 02:29 GMT
>> After all these years you'd think that there would be at least one
>> published study that showed a provable benefit in terms of wear, MPG,
[quoted text clipped - 12 lines]
> long chain molecules into shorter runnier ones, lowering it's viscosity
> and therefore protection.)

Yes, longer change intervals is what synthetic is good for. When Mobil 1
first came out, Mobil was promoting 25K miles between oil changes, but
they quickly backed down from that recommendation because they didn't
want to be liable for warranty issues resulting from owners violating
the required oil change interval in the manual.

Now the longer change intervals are finally making it to the U.S.. The
Mini Cooper is at 15K miles now with synthetic. Going beyond 15-20K is
dicey, not because the oil no longer lubricates, but because of the
acidity caused by the by-products of combustion. If you could add some
more additives that neutralize the acid, you could go even longer.
Jeff - 27 Apr 2009 02:36 GMT
> > In message <9x2Jl.19728$as4.17...@nlpi069.nbdc.sbc.com>, SMS
> > <scharf.ste...@geemail.com> writes
[quoted text clipped - 26 lines]
> acidity caused by the by-products of combustion. If you could add some
> more additives that neutralize the acid, you could go even longer.

One reason why synthetics last longer is they already have more
additives. The additives often cost more than the base stock oil.

Jeff
jim beam - 27 Apr 2009 03:40 GMT
>>> In message <9x2Jl.19728$as4.17...@nlpi069.nbdc.sbc.com>, SMS
>>> <scharf.ste...@geemail.com> writes
[quoted text clipped - 30 lines]
>
> Jeff

actually, it's stability of the base oil, not so much the additives.
because the base is highly refined, it doesn't have nasties in it like
aromatics, branched chains, sulfur, etc.  thus the base, 1-decene for
example, is highly stable, and so doesn't break down.  indeed, 25k was
mobil's original stance on synthetics because it was a real number, and
they were prepared to unconditionally guarantee it too.  but it's not
good for sales and dealer service profits, so they backed down.  you can
try it yourself though - just send oil in for analysis and see how it's
doing.
Tony Hwang - 27 Apr 2009 03:50 GMT
>>> In message <9x2Jl.19728$as4.17...@nlpi069.nbdc.sbc.com>, SMS
>>> <scharf.ste...@geemail.com> writes
[quoted text clipped - 30 lines]
>
> Jeff
Hi,
How about starting with definition of synthetic?
jim beam - 27 Apr 2009 04:27 GMT
>>>> In message <9x2Jl.19728$as4.17...@nlpi069.nbdc.sbc.com>, SMS
>>>> <scharf.ste...@geemail.com> writes
[quoted text clipped - 35 lines]
> Hi,
> How about starting with definition of synthetic?

actually, "synthetic" is hokus pokus.  been to the auto parts store
lately?  looked at brake fluid?  noticed how there's a premium on
"synthetic"?  well, /all/ brake fluid is "synthetic"!

for motor oil, provided the base stock has the required formula, it
doesn't matter whether it was refined or synthesized.

one more thing - despite the fact that "synthetic" motor oils can indeed
be superior stuff, their price premium is a rip compared to production
price.  in indonesia where there's a large g.t.l. [gas to liquid]
facility that manufactures a lot of the world's synthetic oil base
stocks, the stuff they don't sell for lubes is sold as diesel oil.  yes,
it's that cheap.
Tony Hwang - 27 Apr 2009 05:28 GMT
>>>>> In message <9x2Jl.19728$as4.17...@nlpi069.nbdc.sbc.com>, SMS
>>>>> <scharf.ste...@geemail.com> writes
[quoted text clipped - 52 lines]
> stocks, the stuff they don't sell for lubes is sold as diesel oil.  yes,
> it's that cheap.

Hi,
Where do you live? Have any experience driving in sub-arctic zone where
they never shut off engines once it is started in winter time? Even
where I live, it is PRETTY cold in the winter. Including wind chill,
temp. can reach down to -45F or so. Synthetic oil DOES make big difference.
SMS - 27 Apr 2009 05:47 GMT
> Where do you live? Have any experience driving in sub-arctic zone where
> they never shut off engines once it is started in winter time? Even
> where I live, it is PRETTY cold in the winter. Including wind chill,
> temp. can reach down to -45F or so. Synthetic oil DOES make big difference.

Yes, it's true that synthetics have a benefit in extremely cold climates.

But go by the actual temperature, your car engine doesn't care about the
wind chill, which is solely for body heat.
jim beam - 27 Apr 2009 13:47 GMT
>>>>>> In message <9x2Jl.19728$as4.17...@nlpi069.nbdc.sbc.com>, SMS
>>>>>> <scharf.ste...@geemail.com> writes
[quoted text clipped - 60 lines]
> where I live, it is PRETTY cold in the winter. Including wind chill,
> temp. can reach down to -45F or so. Synthetic oil DOES make big difference.

the oil does indeed make a difference - i'm talking about the word.
"s-y-n-t-h-e-t-i-c" is primarily a retail marketing device.  "group IV"
is what the industry uses.
SMS - 27 Apr 2009 05:45 GMT
> One reason why synthetics last longer is they already have more
> additives. The additives often cost more than the base stock oil.

Actually one benefit of the synthetics is that the superior base stock
needs less additives to maintain viscosity, so you get more base stock
and less viscosity modifiers.

Synthetics become acidic, and eventually become saturated with suspended
soot particles, just like regular oil.

An oil analysis is a good investment to determine the optimum oil change
interval, but since you really shouldn't be exceeding the manufacturer's
requirements during the warranty period, and the manufacturers are very
conservative, there's no benefit to using a synthetic if you're doing
7500 or 5000 mile oil changes (except in very cold climates).
jim beam - 27 Apr 2009 13:50 GMT
>> One reason why synthetics last longer is they already have more
>> additives. The additives often cost more than the base stock oil.
[quoted text clipped - 4 lines]
>
> Synthetics become acidic,

/all/ motor oils become acidic.  that's because of combustion product.

> and eventually become saturated with suspended
> soot particles, just like regular oil.
>
> An oil analysis is a good investment to determine the optimum oil change
> interval, but since you really shouldn't be exceeding the manufacturer's
> requirements

er, the whole point of using analysis is so that you /know/ the
condition of the oil.  wtf would you disregard analysis in favor of
guesswork?

> during the warranty period, and the manufacturers are very
> conservative, there's no benefit to using a synthetic if you're doing
> 7500 or 5000 mile oil changes (except in very cold climates).
Tony Hwang - 26 Apr 2009 19:41 GMT
>> A car's length? It would be hard to feel the difference in
>> acceleration. Plus, you would have to floor it to feel the difference.
[quoted text clipped - 11 lines]
> makes them feel good by believing they are doing something good. It's
> rather like a religion.
Hmmm,
I don't live my life based on some one's claim.
Tony Hwang - 26 Apr 2009 19:40 GMT
>>>> Is it possible to feel a difference (smoothness, better acceleration,
>>>> etc.) after a normal-interlude oil change?
[quoted text clipped - 15 lines]
>
> Jeff
Hi,
Then you must be so called motor vehicle operator, not a driver.
Tony Hwang - 26 Apr 2009 19:38 GMT
>> Is it possible to feel a difference (smoothness, better acceleration,
>> etc.) after a normal-interlude oil change?
[quoted text clipped - 8 lines]
> difference between synthetic base stock oil and petroleum base stock
> oil, but of course they can't.
Hmmm,
They can unless being dumb. Just watch the tach.
Cathy F. - 26 Apr 2009 21:19 GMT
> Is it possible to feel a difference (smoothness, better acceleration,
> etc.) after a normal-interlude oil change?  Someone is claiming this and
[quoted text clipped - 4 lines]
> Thanks--
> Al

IMO, it's their imagination.  I've never noticed anything, unless I had
something else adjusted along with the oil change.

Cathy
Tony Hwang - 27 Apr 2009 05:29 GMT
>> Is it possible to feel a difference (smoothness, better acceleration,
>> etc.) after a normal-interlude oil change?  Someone is claiming this and
[quoted text clipped - 9 lines]
>
> Cathy

Hi,
Dull people can't even imagine, LOL!
Dave D - 27 Apr 2009 07:24 GMT
> Is it possible to feel a difference (smoothness, better acceleration,
> etc.) after a normal-interlude oil change?  Someone is claiming this and
[quoted text clipped - 4 lines]
> Thanks--
> Al

If I do it myself - No change... If I have it done by someone - most
definitely!!!!  My wallet always feels much lighter!!!!!!!!!!!!

DaveD
bogusmailmark@yahoo.com - 27 Apr 2009 13:59 GMT
If you're changing every 3-5,000 miles, then most likely you won't/
can't detect a difference.  However, if the oil level was down a quart
or two, and was excessively dirty, then I can at least entertain the
possibility that it would make a difference with fresh oil hitting all
the lubricated surfaces inside the motor.

After changing the oil on a friend's car after 11K miles between
changes, I recall that it seemed to idle smoother and quieter
afterward.

> Is it possible to feel a difference (smoothness, better acceleration,
> etc.) after a normal-interlude oil change?  Someone is claiming this and
[quoted text clipped - 4 lines]
> Thanks--
> Al
 
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