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Car Forum / Audi Cars / February 2008

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2.7T Gas Mileage

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Ken K - 21 Jan 2008 22:12 GMT
I am a recent owner of a 03 2.7T and am getting about 18 mpg. I am running
premium gas and most of the driving is highway. The computer claims I am
getting an average of 21.6. Does this sound right? If not, what can I do to
improve the mileage?
Thanks, K
Kevin McMurtrie - 21 Jan 2008 23:49 GMT
> I am a recent owner of a 03 2.7T and am getting about 18 mpg. I am running
> premium gas and most of the driving is highway. The computer claims I am
> getting an average of 21.6. Does this sound right? If not, what can I do to
> improve the mileage?
> Thanks, K

That's probably right unless it's a diesel.  Audis suck gasoline.

I don't know the specifics of your car, but some of them can run on
cheaper gas with no ill effect for light driving.  Fill up with 87 or 89
(US grades) for weekday commuting then put in 91 or 92 for the weekend
trip out of town.

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I don't read Google's spam.  Reply with another service.

Benjamin Gawert - 25 Jan 2008 09:09 GMT
* Kevin McMurtrie:
> Audis suck gasoline.

Not unless used in a country with low fuel quality. Remember that these
engines are developed with European ROZ95/98 in mind and have to be
modified/limited (electronically and/or mechanically) to run somewhat
reliable in countries that have inferior fuel quality standards than
western Europe.

Benjamin
Pete - 25 Jan 2008 14:38 GMT
> Not unless used in a country with low fuel quality. Remember that
> these engines are developed with European ROZ95/98 in mind and have to
> be modified/limited (electronically and/or mechanically) to run
> somewhat reliable in countries that have inferior fuel quality
> standards than western Europe.

Are you saying all Audis sold in the US have to be modified in order to
run reliably here?

Are you aware of two different formulas used around the world to
calculate the octane number?

Regards,
Pete
Benjamin Gawert - 27 Jan 2008 16:52 GMT
* Pete:

> Are you saying all Audis sold in the US have to be modified in order to
> run reliably here?

I assume "here" for you means the US? If so then yes. The fuel quality
in the US is much lower than in western Europe. The Audis (and VWs and
BMWs and Mercedes) that are made for the US contain specific
modifications to run reliable with that low fuel quality.

Benjamin
Steve Thompson - 27 Jan 2008 17:44 GMT
> I assume "here" for you means the US? If so then yes. The fuel quality in the
> US is much lower than in western Europe. The Audis (and VWs and BMWs and
> Mercedes) that are made for the US contain specific modifications to run
> reliable with that low fuel quality.

Anecdote time. Back in 1981, I was living in New York, and owned a Camaro.
I went to live in England, taking the Camaro with me. I expected the
numerical miles per gallon to increase by roughly 20%, since the imperial
gallon is 20% larger than the US gallon, and my driving mix was similar.
In fact, it actually increased by 44%. A year later, I went back to the
US, and the mpg dropped back to its former value.

Steve
Pete - 27 Jan 2008 19:22 GMT
> The fuel quality in the US is much lower than in western Europe. The
> Audis (and VWs and BMWs and Mercedes) that are made for the US contain
> specific modifications to run reliable with that low fuel quality.

Can you provide links to some documentation on this subject?  It's not
that I don't trust you.  It's just that I'd like to find a valid source
if this information.

Thanks,
Pete
H.D. - 28 Jan 2008 12:26 GMT
Hello Pete

>> The fuel quality in the US is much lower than in western Europe. The
>> Audis (and VWs and BMWs and Mercedes) that are made for the US contain
[quoted text clipped - 3 lines]
>that I don't trust you.  It's just that I'd like to find a valid source
>if this information.

In European Union, Iceland, Norway and Switzerland diesel fuel must meet
EN-590.
More here:
http://en.wikipedia.org/wiki/EN_590

I know for gas[oline], there is also such a norm, but have to look up
the EN number first.
Benjamin Gawert - 31 Jan 2008 14:18 GMT
* Pete:

>> The fuel quality in the US is much lower than in western Europe. The
>> Audis (and VWs and BMWs and Mercedes) that are made for the US contain
[quoted text clipped - 3 lines]
> that I don't trust you.  It's just that I'd like to find a valid source
> if this information.

I don't have a link by hand. There once were some articles on a oil
company website that discussed that stuff but I can't remember the link.

You can for example compare the European fuel standards (EN228 for
gasoline and EN590 for Diesel) with the equivalent US standards and
you'll see that the European standards are much tighter.

Besides that, if you have access to maintenance/part documentation you
can compare the specifications for US and European models of certain
cars. I.e. the last Volkswagen Passat with 1.8l Turbo engine (20 valve)
was sold in the US with 130hp while the European version had 150hp. This
was done because of the lower fuel quality.

There are other differences as well. German-made cars sold in Western
Europe usually conform to the German standard which means the car must
run reliable even when driving at maximum speed for a long time.
Overseas versions which rarely get driven faster than 55-80 mp/h often
come with downsized cooling systems, brake systems and other things
which save the manufacturer money and have no influence on safety or
reliability in countries with general speed limits.

Benjamin
Pete - 01 Feb 2008 01:35 GMT
> I.e. the last Volkswagen Passat with 1.8l Turbo engine (20 valve) was sold
> in the US with 130hp while the European version had 150hp. This was done
> because of the lower fuel quality.

The 1.8T never had 130hp in the US.  It had 150hp initially, and then 170hp
in later years.

Pete
Benjamin Gawert - 01 Feb 2008 15:44 GMT
* Pete:
>> I.e. the last Volkswagen Passat with 1.8l Turbo engine (20 valve) was sold
>> in the US with 130hp while the European version had 150hp. This was done
>> because of the lower fuel quality.
>
> The 1.8T never had 130hp in the US.  It had 150hp initially, and then 170hp
> in later years.

There definitely was a ~130hp version of the 1.8T engine in the old
Passat (3BG). One of my flight instructors had such a car in 2003, made
in Mexico. IIRC the life cycle of this version was rather short.

Benjamin
Pete - 02 Feb 2008 05:49 GMT
> There definitely was a ~130hp version of the 1.8T engine in the old Passat
> (3BG). One of my flight instructors had such a car in 2003, made in
> Mexico. IIRC the life cycle of this version was rather short.

I'm sorry, but you've got it all wrong.  The first time a 1.8T was offered
in a Passat in the US was in 1998, and it had 150 hp.  And it wasn't made in
Mexico either.

The only engine that I can think of that had around 130 hp (134 to be exact)
was a 2-liter non-turbo one offered back in 1990 on the Passat.

Pete
No Spam Please - 03 Feb 2008 11:23 GMT
>> There definitely was a ~130hp version of the 1.8T engine in the old
>> Passat (3BG). One of my flight instructors had such a car in 2003, made
>> in Mexico. IIRC the life cycle of this version was rather short.

Apparently so short that there was only one made <g>.
No Spam Please - 03 Feb 2008 11:23 GMT
>> There definitely was a ~130hp version of the 1.8T engine in the old
>> Passat (3BG). One of my flight instructors had such a car in 2003, made
>> in Mexico. IIRC the life cycle of this version was rather short.

Apparently so short that there was only one made <g>.
Benjamin Gawert - 07 Feb 2008 18:36 GMT
* Pete:

> I'm sorry, but you've got it all wrong.  The first time a 1.8T was offered
> in a Passat in the US was in 1998, and it had 150 hp.  And it wasn't made in
> Mexico either.

I'm quite sure about that. I have seen the spec sheet, and we have been
at a Volkswagen dealer in San Jose where he bought that car, and while
he was giving it away for service I talked with the dealer who explaned
me that he sells regular Passats made in Emden, Germany, and Passats
made in or made for (I'm not sure of that) Mexico.

I know the Passat 3BG very well, and the interior quality of this Passat
was noticeably worse than any 3BG I've seen before.

> The only engine that I can think of that had around 130 hp (134 to be exact)
> was a 2-liter non-turbo one offered back in 1990 on the Passat.

In 1990 there was no Passat 3BG.

Benjamin
Pete - 07 Feb 2008 19:19 GMT
> I know the Passat 3BG very well, and the interior quality of this Passat
> was noticeably worse than any 3BG I've seen before.

What exactly is a Passat 3BG?  I've never heard of this nomenclature out
here in the US.  Is it a B5? B5.5? B6?  During which years was it available?

Pete
Benjamin Gawert - 09 Feb 2008 11:20 GMT
* Pete:

> What exactly is a Passat 3BG?  I've never heard of this nomenclature out
> here in the US.  

3BG stands for the internal VW model nomenclature (like "D2" and "4E"
for the Audi A8). The 3BG is the facelift version of the 3B (the
successor of the Passat 35I).

This is a Passat 3B:
<http://www.autogaleria.pl/tapety/img/volkswagen/volkswagen_passat_1997_01_b.jpg>

And these are Passat 3BG:
<http://fotogalerien.tuningzine.de/rieger_vw_passat_30102006/vw_passat_text_1.jpg>
<http://www.autopflege24.net/showshine/2007/passat/passat_index.jpg>

And this is the old 35I:
<http://www.selfbase.com/car_interior_database/photos/cars/400/4400501401.jpg>

The 3BG was basically made to make the Passat look more luxurious and to
be able to compete with Mercedes C-class, BMW 3-series and Audi A4.

> During which years was it available?

I don't know the timeframe it was sold in the US (but I doubt it differs
much) but here in Germany the 35I was made from 1988 to 1996 where the
35B was introduced. It was replaced by the 3BG in 2000. The 3BG was
terminated in 2005.

BTW: does the US also have the hazzle with bio ethanol mixture in
regular fuel? Here in Germany the government forced that all grades of
gas contain 5% of bio enthanol (E5 gas). A new law from 2006 now forces
the percentage of bio ethanol to raise to 10% (E10 gas), probably
starting already in 2009. Bio ethanol is very corrosive and can cause
higher wear (especially in the area of valve seating), it's expensive to
produce which makes the gas more expensive and also contains less energy
than gas which leads to a lower gas mileage. Since it's still not really
clear which older cars do tolerate E10 gas and which don't (for example,
Audi says all models since 1992 can tolerate E10 - except FSI engines
before 2004!) the government decided to leave around 1000 gas stations
nationwide with E5 "Super Plus" (premium grade, most older cars only
require lower grades) gas until 2016 where no E5 will be available any
more in this country. Not only "Super Plus" is the most expensive gas
grade, the E5 "Super Plus" will be even more expensive due to higher
logistics and production costs. So you buy a new Ford Ka (compact car)
today, you won't find any fuel for it after 2016. You have an Audi, Seat
or Volkswagen with FSI engine older than 2004? Same problem. You have an
Mitsubishi Carisma GDI? Same problem. And this goes on for lots of other
cars, too. Besides that, even for the manufacturer it's not clear what
long-term effects bio ethanol has in older cars. Isn't that great?

Benjamin

Benjamin
Dano58 - 08 Feb 2008 18:19 GMT
> * Pete:
>
[quoted text clipped - 15 lines]
>
> In 1990 there was no Passat 3BG.

Well, the 1990 Passat was the same as the 1991 - 1996 cars, so if the
'3BG' nomenclature applies to the 1991 and newer, it should apply to
the 1990 as well. And a quick scan of edmunds.com shows that the 2.0L
I4 engine was available off and on through the '90's, until the 1.8T
with 150hp debuted with the 1998 newly-rebodied Passat.

Dan D
'04 A4 1.8Tq MT-6
Central NJ USA
Benjamin Gawert - 09 Feb 2008 11:22 GMT
* Dano58:

> Well, the 1990 Passat was the same as the 1991 - 1996 cars

Right, it's the Passat 35I.

> , so if the '3BG' nomenclature applies to the 1991 and newer

No, it doesn't. 3BG was made from 2000-2005.

Benjamin
No Spam Please - 01 Feb 2008 05:36 GMT
I call bullshit....

>* Pete:
>>
[quoted text clipped - 28 lines]
>
> Benjamin
No Spam Please - 01 Feb 2008 05:36 GMT
I call bullshit....

>* Pete:
>>
[quoted text clipped - 28 lines]
>
> Benjamin
daytripper - 22 Jan 2008 01:29 GMT
>I am a recent owner of a 03 2.7T and am getting about 18 mpg. I am running
>premium gas and most of the driving is highway. The computer claims I am
>getting an average of 21.6. Does this sound right? If not, what can I do to
>improve the mileage?
>Thanks, K

I live in New England, and have kept a mileage-tracking spreadsheet on all of
our vehicles (for god only knows what reasons ;-) Over its life (I've owned it
since brand spanking new), my S4 has averaged an actual 20.56 miles per
gallon, while the computer-calculated mileage has indicated an average of
21.50 mpg. Not too bad an error rate (4.39%). All fuel used was at least 91
octane; and I'm guessing most of those miles were using 10% ethanol.

The vast majority of my S4 mileage has been on the highway, usually cruising
at around 85mph in top (6th) gear.

Are you driving an A6 S-line, or ? I expect the 6er is heavier than my car,
which might explain some of the difference...

Cheers

/daytripper
'00 s4 6spd
tpow - 22 Jan 2008 06:00 GMT
>I am a recent owner of a 03 2.7T and am getting about 18 mpg. I am running
>premium gas and most of the driving is highway. The computer claims I am
>getting an average of 21.6. Does this sound right? If not, what can I do to
>improve the mileage?
> Thanks, K

keep the revs to around 2000-2200, no hard acceleration or high speeds up
through the gears.

keep tyres at the correct pressure.............

reduce air con/climate control running..............
Dano58 - 22 Jan 2008 14:21 GMT
> I am a recent owner of a 03 2.7T and am getting about 18 mpg. I am running
> premium gas and most of the driving is highway. The computer claims I am
> getting an average of 21.6. Does this sound right? If not, what can I do to
> improve the mileage?
> Thanks, K

Well, that's a little below the EPA estimates of 18/25, but, of
course, that's the old estimate that doesn't reflect real-world
driving like using the climate control, headlights, etc. Any codes
stored in the car? You can get that checked at Autozone for free.
Might not be a bad idea to make sure there is nothing going on that
might not be generating a CEL. I'm not sure how the computer
calculates the mileage but the old 'divide the elapsed mileage by the
number of gallons' is the best way to calculate it. My computer seems
to read a little high.

In my car I have averaged 22.78 mpg since new, 80% around-town
driving.

Dan D
'04 A4 1.8Tq MT-6
Central NJ USA
Pete - 24 Jan 2008 04:44 GMT
>I am a recent owner of a 03 2.7T and am getting about 18 mpg. I am
>running premium gas and most of the driving is highway. The computer
>claims I am getting an average of 21.6. Does this sound right? If not,
>what can I do to improve the mileage?

When was the last time your sparkplugs and engine air filter were
replaced?  If it's been a while, you may want to replace them.  18 mpg
seems a little low, but then again, it depends on how fast you drive.

Pete
K04-S4 - 24 Jan 2008 17:11 GMT
Check the owner's manaul or the gas tank fill door to confirm the 2.7
needs a minimum of 91 Octane fuel.  Being a twin turbo engine with knoc
sensors, filling up with a lower grade fuel will definitely reduce ga
mileage and performance.  Lower octane fuels also increase risk o
clogging up the fuel system as well as increasing emmissions which i
harder on O2 sensors, EGT sensors and all four of the the expensiv
catalytic convertors.

What is the vehicle odometer mileage?

Recommend a VAG scan to see if there are O2 sensor or EGT sensor codes
Failing O2's and EGT Sensors will reduce gas mileage.  I replaced bot
front O2's at 80K KMs on 2.7T, they are primary feedback to ECU for aut
adjusting A/F mixture.  VAG-COM supports tests that can be performed t
check responsiveness of O2s, they can become sluggish with age befor
triggering DTCs and CELs

--
K04-S
Vk - 25 Jan 2008 14:43 GMT
> Check the owner's manaul or the gas tank fill door to confirm the 2.7T
> needs a minimum of 91 Octane fuel.  Being a twin turbo engine with knock
[quoted text clipped - 18 lines]
> K04-S4's Profile:http://www.audiforum.ca/member.php?userid=2727
> View this thread:http://www.audiforum.ca/showthread.php?t=15724

I have a 2000 A6 2.7L twinturbo. I use 93 octane. My mileage is about
21-22 from a mix of local and highway travel. When I average just the
highway then the mileage seems higher ~25 and if it is local then it
falls to ~19. Once my average went to 17 or 18 even with enough
highway travel from 21. This went about few weeks and my car starting
shaking and I had to turn it in to a mechanic (decent one) and he
found lot of deposit on one of my valves. he opened up the engine,
replaced it and costed me a lot of money.  I would recommend spark
plug change and engine cleaning to remove any deposits.
Bruce W. Ellis - 29 Jan 2008 03:09 GMT
>I am a recent owner of a 03 2.7T and am getting about 18 mpg. I am running
>premium gas and most of the driving is highway. The computer claims I am
>getting an average of 21.6. Does this sound right? If not, what can I do to
>improve the mileage?
>Thanks, K

My 2000 A6 2.7T generally gives in the low 20's when at highway speed
(~ 70).  City driving in the upper teens.  The nice thing about a
relatively small V6 is that it will do well with gas mileage at
cruising.  The MPG depends on how much you engage the loud pedal
(turbos).  The power is there when you need it (to pass, etc.) but a
large displacement engine is not being pumped when not needed.  Your
mileage may vary..
Pete - 29 Jan 2008 04:23 GMT
> My 2000 A6 2.7T generally gives in the low 20's when at highway speed
> (~ 70).  City driving in the upper teens.  The nice thing about a
> relatively small V6 is that it will do well with gas mileage at
> cruising.

You call low 20s good gas mileage at cruising?  Maybe for a 5-liter V10
engine.  Most modern V6 and I6 engines can do much better these days.

Don't get me wrong, I know this 2.7tt is not your ordinary V6 and it
lots of fun, but good gas mileage is not one of it's strong points.

Pete
Kevin McMurtrie - 29 Jan 2008 07:18 GMT
> > My 2000 A6 2.7T generally gives in the low 20's when at highway speed
> > (~ 70).  City driving in the upper teens.  The nice thing about a
[quoted text clipped - 8 lines]
>
> Pete

VWs lack the high top gear that gives Japanese cars their good milage.  
It makes them more responsive but it costs dearly in cruising efficiency.

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Pete - 29 Jan 2008 17:27 GMT
"Kevin McMurtrie"
> VWs lack the high top gear that gives Japanese cars their good milage.
> It makes them more responsive but it costs dearly in cruising efficiency.

Add to that the permanent awd system in that A6 2.7T which also negatively
affects mpg, both from the mechanical and added weight perspectives.  My
530i gets 30 mpg (US) if I cruise at 70 mph.

Pete
TonyKiz - 15 Feb 2008 20:49 GMT
My 2004 A6 2.7T S-Line with 57,000 miles gets around 19 in mixed suburban
driving with a gentle accelerator pedal and about 24 on the highway. Of
course, when I'm having fun, it goes down to 14 to 16 mpg ... :)

>>I am a recent owner of a 03 2.7T and am getting about 18 mpg. I am running
>>premium gas and most of the driving is highway. The computer claims I am
[quoted text clipped - 10 lines]
> large displacement engine is not being pumped when not needed.  Your
> mileage may vary..
 
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