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Car Forum / Subaru Cars / June 2004

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wrx average mpg

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-rick- - 23 May 2004 05:27 GMT
I just cleaned about 2 years of gas receipts out of the armrest and checked
mileage...

n = 50
mean = 22.18 mpg
sigma = 1.36
min = 18.93
max = 25.17

US gallons, '02 wrx wagon, 5speed manual, 13mile commute on mostly highway plus
weekend trips.
GRL - 23 May 2004 13:50 GMT
Without some indication of the type of driving the numbers are meaningless.
For example, I have a 2000 Yukon XL. If I drive city-only, I get 12 mpg (Not
good overall, but really pretty good for something that huge.) If I drive
highway only I get 20 mpg (again, really good when you consider the size of
the thing and the fact that most midsize sedans get only about 25 mpg
highway).

If I did a blend, I could get anything in the middle, but the information
would be useless unless the exact blend were noted..

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- GRL

"It's good to want things."

                     Steve Barr (philosopher, poet, humorist, chemist,
Visual Basic programmer)

> I just cleaned about 2 years of gas receipts out of the armrest and checked
> mileage...
[quoted text clipped - 7 lines]
> US gallons, '02 wrx wagon, 5speed manual, 13mile commute on mostly highway plus
> weekend trips.
DG - 23 May 2004 19:39 GMT
Are you looking for more detail than what he already said??

"13mile commute on mostly highway plus
weekend trips."
Sam Soltan - 24 May 2004 04:09 GMT
I'm averaging about 26 mpg. I drive about 73 miles per day West Bloomfield
to Grosse Pointe. Some stop and go but mostly highway. I found I get better
milage with Mobile premium than with Sunoco premium.
Chauncey Gardiner - 25 May 2004 18:42 GMT
I do a 130 mile commute (round trip) in a 2003 WRX, mixed mountain and
valley driving, most of it at highway speed.  I get between 22 and 24.
Sounds like that's pretty average.

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Edward Hayes - 23 May 2004 14:36 GMT
Excellent statistical good information Rick. Thank you Ed Hayes
> I just cleaned about 2 years of gas receipts out of the armrest and checked
> mileage...
[quoted text clipped - 7 lines]
> US gallons, '02 wrx wagon, 5speed manual, 13mile commute on mostly highway plus
> weekend trips.
WRXtreme - 23 May 2004 15:24 GMT
> I just cleaned about 2 years of gas receipts out of the armrest and checked
> mileage...
[quoted text clipped - 7 lines]
> US gallons, '02 wrx wagon, 5speed manual, 13mile commute on mostly highway plus
> weekend trips.

Prior to performing aftermarket upgrades on my car I was getting an average
of 19-21 mpg.  I admittedly drive more aggressively than most people on the
road.  After my upgrades (Turbo, FMIC, Catless Exhaust, UTEC, EBC, 850cc
injectors, Walbro Fuel Pump, K&N w/ airbox mod, grounding modification, full
perrin/tein suspension system) I am now getting on average about 23-26 mpg!
This includes averages taken from track days @ a local road course/autocross
course as well as days at the dragstrip.
allyf - 24 May 2004 17:10 GMT
Drive more aggressively?  How do you drive aggressively?

You mean more recklessly

> > I just cleaned about 2 years of gas receipts out of the armrest and
> checked
[quoted text clipped - 17 lines]
> This includes averages taken from track days @ a local road course/autocross
> course as well as days at the dragstrip.
oothlagre - 24 May 2004 19:00 GMT
I think he means cutting people off, hanin' the bird and running people into
the ditch.

> Drive more aggressively?  How do you drive aggressively?
>
[quoted text clipped - 27 lines]
> course/autocross
> > course as well as days at the dragstrip.
WRXtreme - 25 May 2004 05:12 GMT
No, I think I mean I have a perfect driving record for all 15 years that I
have been driving (well, one seatbelt violation a few years ago when I
thought I was "too cool" to wear one).

I do tend to accelerate more quickly than most do, however I don't dragrace
at the lights, that is what the track is for.  I also tend to rev the engine
higher before shifting gears than most people do.  I very seldom exceed the
speed limits (ok, on interstates I go about 5mph over the limit, but you
know what I mean) nor do I exceed my driving capabilities.

How can I say this for certain?

Well, I have 3 (4 if you count my wifes WRX as well) very well tuned cars
(2002 WRX, 1994 Nissan 240SX Silvia Conversion, 1991 Mitsubishi Eclipse GSX,
and my wifes 2003 WRX) that I use for various forms of racing (Drag, Drift,
Autocross, Roadcourse, Rally Cross).  Being a racer has taught me to pay
more attention to those around me because at high speeds being aggressive in
response to what happens around you can save your life as well as the life
of others.

Care to stick your foot any farther in your mouth?

> I think he means cutting people off, hanin' the bird and running people into
> the ditch.
[quoted text clipped - 30 lines]
> > course/autocross
> > > course as well as days at the dragstrip.
oothlagre - 25 May 2004 06:22 GMT
well, then you have a different definition of "aggressive driving" than we
do here. "aggressive driving" here will get you a big fat ticket, maybe time
in jail.

> No, I think I mean I have a perfect driving record for all 15 years that I
> have been driving (well, one seatbelt violation a few years ago when I
[quoted text clipped - 56 lines]
> > > course/autocross
> > > > course as well as days at the dragstrip.
Lenny - 25 May 2004 16:24 GMT
>... speed limits (ok, on interstates I go about 5mph over the limit, but
you...

5 over?  Around here you would be watching the rest of traffic pass you by
on the interstate.

Cheers!
WRXtreme - 26 May 2004 04:51 GMT
> >... speed limits (ok, on interstates I go about 5mph over the limit, but
> you...
[quoted text clipped - 3 lines]
>
> Cheers!

Around here 5 over will result in a $103 fine.  Actually 1mph over will
result in that, but its not likely that you'll get nailed for going 71 in a
70....75 and they start watching, 80 and you are busted (and paying $113 by
that point).  The other state that I drive in frequently has a 75mph speed
limit, so going 80 there is fairly common for me.  And, to be 100% honest I
do tend to follow what the other traffic is doing, if they go 85, I go 85,
if they go 75, I go 75...etc.
Lenny - 29 May 2004 16:07 GMT
Here in Illinois you can appear at court on the date assigned on the ticket
and get "court supervision" for about $150 for minor infringements.  As long
as you aren't ticketed in the following set time (usually six months) it
never appears on your driving record.  It seems like bribery to me, but I'm
not complaining.  I have done it twice and I always get the Sec. of State
commendation for being a good driver.  My mileage, btw, is about 22-24 with
a lot of both city and highway driving.

Cheers!

Lenny

> > >... speed limits (ok, on interstates I go about 5mph over the limit, but
> > you...
[quoted text clipped - 11 lines]
> do tend to follow what the other traffic is doing, if they go 85, I go 85,
> if they go 75, I go 75...etc.
oothlagre - 31 May 2004 08:04 GMT
We get a similar deal here in Utah if we also take a driver's safety class
with all the other "destination-oriented" drivers.

Henry

> Here in Illinois you can appear at court on the date assigned on the ticket
> and get "court supervision" for about $150 for minor infringements.  As long
[quoted text clipped - 28 lines]
> > do tend to follow what the other traffic is doing, if they go 85, I go 85,
> > if they go 75, I go 75...etc.
Ignignokt - 25 May 2004 03:01 GMT
> Drive more aggressively?  How do you drive aggressively?
>
> You mean more recklessly

You say "potato"...

I know when *I* use the term aggressive, I mean that I will make the effort
to pass you on a two-lane highway if you're going less than 5 mph above the
posted speed limit (yes, I wrote "above") and a safe passing opportunity
presents itself.  Feel free to think that this is reckless, but I sleep
fine.

I'll tell ya what:  You cut me a little slack for wanting to get where I'm
going when I drive and I'll cut you some slack for driving with your
high-beams on during the day.  Or shining them into my rearview mirror at
night.  Or using your fog lights when it isn't foggy.  Or pulling out in
front of me instead of waiting the three seconds for me to drive past you.
Or speeding up after I pass you and then tailgating me at a much higher
speed than inspired me to pass you in the first place.  Or driving 15 mph
over the limit while there are four lanes (and therefore an opportunity for
me to pass you) and then slowing down to 5 mph *under* the limit when the
road drops back to only two lanes (making passing you more difficult and,
yes Virginia, dangerous).  Or merging into my lane without bothering to
check whether somebody else is already there.  Or refusing to move over when
I'm trying to merge onto the expressway.  Or driving exactly the same speed
as the vehicle next to you on the expressway with forty nine other cars
lined up behind the both of you.  Or camping out in the middle lane of a
6-lane highway with traffic zooming around you on both sides.  Or any of the
other bone-headed things that so many self-described "safe" drivers do to me
and everybody else every damn day.

On balance, I think that my habit of exceeding the speed limit and passing
slower drivers is about the least dangerous thing you're likely to encounter
on the road.  Speed is seriously over-demonized in this country.  Far more
accidents happen because docile drivers aren't paying attention than are
caused by self-described "aggressive" drivers.  Yet it's the aggressive
drivers who get the tickets and have to live with the stigma of somehow
being bad people.  I'm sick of it.  In case you couldn't tell.

- Greg Reed

Signature

2001 Chevy Astro AWD (wife's)
2004 Subaru Forester Turbo 5-Speed

                 

William S. Hubbard - 28 May 2004 17:58 GMT
 Well said!
 > *** post for FREE via your newsreader at post.newsfeed.com ***
 >
 > allyf wrote:
 > > Drive more aggressively?  How do you drive aggressively?
 > >
 > > You mean more recklessly
 >
 > You say "potato"...
 >
 > I know when *I* use the term aggressive, I mean that I will make the
effort
 > to pass you on a two-lane highway if you're going less than 5 mph above
the
 > posted speed limit (yes, I wrote "above") and a safe passing opportunity
 > presents itself.  Feel free to think that this is reckless, but I sleep
 > fine.
 >
 > I'll tell ya what:  You cut me a little slack for wanting to get where
I'm
 > going when I drive and I'll cut you some slack for driving with your
 > high-beams on during the day.  Or shining them into my rearview mirror
at
 > night.  Or using your fog lights when it isn't foggy.  Or pulling out in
 > front of me instead of waiting the three seconds for me to drive past
you.
 > Or speeding up after I pass you and then tailgating me at a much higher
 > speed than inspired me to pass you in the first place.  Or driving 15
mph
 > over the limit while there are four lanes (and therefore an opportunity
for
 > me to pass you) and then slowing down to 5 mph *under* the limit when
the
 > road drops back to only two lanes (making passing you more difficult
and,
 > yes Virginia, dangerous).  Or merging into my lane without bothering to
 > check whether somebody else is already there.  Or refusing to move over
when
 > I'm trying to merge onto the expressway.  Or driving exactly the same
speed
 > as the vehicle next to you on the expressway with forty nine other cars
 > lined up behind the both of you.  Or camping out in the middle lane of a
 > 6-lane highway with traffic zooming around you on both sides.  Or any of
the
 > other bone-headed things that so many self-described "safe" drivers do
to me
 > and everybody else every damn day.
 >
 > On balance, I think that my habit of exceeding the speed limit and
passing
 > slower drivers is about the least dangerous thing you're likely to
encounter
 > on the road.  Speed is seriously over-demonized in this country.  Far
more
 > accidents happen because docile drivers aren't paying attention than are
 > caused by self-described "aggressive" drivers.  Yet it's the aggressive
 > drivers who get the tickets and have to live with the stigma of somehow
 > being bad people.  I'm sick of it.  In case you couldn't tell.
 >
 > - Greg Reed
 >
 > --
 > 2001 Chevy Astro AWD (wife's)
 > 2004 Subaru Forester Turbo 5-Speed
 >
 >
 >
 >
 >  -----= Posted via Newsfeed.Com, Uncensored Usenet News =-----
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 >
oothlagre - 31 May 2004 08:00 GMT
Hey Greg, do you live in Utah by any chance? You just described 90% of the
drivers here!!

Henry

>   Well said!
>   > *** post for FREE via your newsreader at post.newsfeed.com ***
[quoted text clipped - 68 lines]
>   > -----== 100,000 Groups! - 19 Servers! - Unlimited Download! =-----
>   >
Ignignokt - 01 Jun 2004 07:44 GMT
> Hey Greg, do you live in Utah by any chance? You just described 90%
> of the drivers here!!

I live in northern Michigan.  But I'm pretty sure I described 90% of the
drivers everywhere except Germany.

- Greg Reed

Signature

2001 Chevy Astro AWD (wife's)
2004 Subaru Forester Turbo 5-Speed

                 

CompUser - 02 Jun 2004 04:45 GMT
> *** post for FREE via your newsreader at post.newsfeed.com ***
>
[quoted text clipped - 3 lines]
> I live in northern Michigan.  But I'm pretty sure I described 90% of the
> drivers everywhere except Germany.

Three years in FRG taught me they are impatient,
but skilled drivers...as opposed to our typically
impatient, *unskilled* drivers ;-)

Steve
William S. Hubbard - 28 May 2004 17:58 GMT
 Nanny, nanny..
 > Drive more aggressively?  How do you drive aggressively?
 >
 > You mean more recklessly
 >
 >
 > "WRXtreme" <xangor1@yahoo.com> wrote in message
 > news:10b1cvtcahdeb68@corp.supernews.com...
 > >
 > > "-rick-" <dont@bother.com> wrote in message
 > > news:jr2dneJU0v_ItS3dRVn_iw@comcast.com...
 > > > I just cleaned about 2 years of gas receipts out of the armrest and
 > > checked
 > > > mileage...
 > > >
 > > > n = 50
 > > > mean = 22.18 mpg
 > > > sigma = 1.36
 > > > min = 18.93
 > > > max = 25.17
 > > >
 > > > US gallons, '02 wrx wagon, 5speed manual, 13mile commute on mostly
 > highway
 > > plus
 > > > weekend trips.
 > > >
 > > Prior to performing aftermarket upgrades on my car I was getting an
 > average
 > > of 19-21 mpg.  I admittedly drive more aggressively than most people
on
 > the
 > > road.  After my upgrades (Turbo, FMIC, Catless Exhaust, UTEC, EBC,
850cc
 > > injectors, Walbro Fuel Pump, K&N w/ airbox mod, grounding
modification,
 > full
 > > perrin/tein suspension system) I am now getting on average about 23-26
 > mpg!
 > > This includes averages taken from track days @ a local road
 > course/autocross
 > > course as well as days at the dragstrip.
 > >
 > >
 >
 >
SuperPoo - 27 May 2004 02:52 GMT
I have been casually watching my fuel economy for 36k in my 2002 WRX Wagon.
My average is about 16mpg, my worst tank was low 13's and I have never
gotten over 20mpg out of a tank. You would think after two years I could
keep my foot out of it-- I can't.

Steve

> I just cleaned about 2 years of gas receipts out of the armrest and checked
> mileage...
[quoted text clipped - 7 lines]
> US gallons, '02 wrx wagon, 5speed manual, 13mile commute on mostly highway plus
> weekend trips.
-rick- - 27 May 2004 04:42 GMT
> I have been casually watching my fuel economy for 36k in my 2002 WRX Wagon.
> My average is about 16mpg, my worst tank was low 13's and I have never
> gotten over 20mpg out of a tank. You would think after two years I could
> keep my foot out of it-- I can't.
>
> Steve

I envy you.  You must live in the country or at least not have too much traffic
or police to stifle your enthusiasm.

-rick-
Edward Hayes - 27 May 2004 14:10 GMT
Hi SuperPoo: Did you do an AVE calculation which for me is relevant???
Thanks again for the good statistical analysis. ed
> I have been casually watching my fuel economy for 36k in my 2002 WRX Wagon.
> My average is about 16mpg, my worst tank was low 13's and I have never
[quoted text clipped - 16 lines]
> plus
> > weekend trips.
Ignignokt - 29 May 2004 16:42 GMT
> Hi SuperPoo: Did you do an AVE calculation which for me is relevant???
> Thanks again for the good statistical analysis. ed
[quoted text clipped - 18 lines]
>> plus
>>> weekend trips.

Ed,

In statistics "mean" means average.  Whether that average is actually cruel
or not depends a lot on the values used to calculate it.

- Greg Reed

Signature

2001 Chevy Astro AWD (wife's)
2004 Subaru Forester Turbo 5-Speed

                 

SuperPoo - 30 May 2004 04:25 GMT
Hey Ed, what is an "AVE calculation"? Thanks.

Steve

> Hi SuperPoo: Did you do an AVE calculation which for me is relevant???
> Thanks again for the good statistical analysis. ed
[quoted text clipped - 20 lines]
> > plus
> > > weekend trips.
Edward Hayes - 30 May 2004 19:05 GMT
The mean is the best mileage + lowest mileage divided by 2. The average is
the mileage of each fillup added together divided by the total number of
fillups. i.e. 23.6+19.3+25.1/3 = 22.66 mpg. Ed
> Hey Ed, what is an "AVE calculation"? Thanks.
>
[quoted text clipped - 24 lines]
> > > plus
> > > > weekend trips.
-rick- - 31 May 2004 06:11 GMT
> The mean is the best mileage + lowest mileage divided by 2. The average is
> the mileage of each fillup added together divided by the total number of
> fillups. i.e. 23.6+19.3+25.1/3 = 22.66 mpg. Ed

Actually median is the midpoint between max and min.  Mean is synonymous with
average.
-rick-
Bruce Hoult - 31 May 2004 09:01 GMT
> > The mean is the best mileage + lowest mileage divided by 2. The average is
> > the mileage of each fillup added together divided by the total number of
> > fillups. i.e. 23.6+19.3+25.1/3 = 22.66 mpg. Ed
>
> Actually median is the midpoint between max and min.  Mean is synonymous with
> average.

Uh, no ... the median is the number where half of the mileages are
better and half are worse.

And it doesn't make any sense to add up MPG numbers and then divide by
the number of samples.  Yes, mathematically you can do that and get a
number, but it's not a useful number.  Just add up all the miles, and
add up all the gallons, and divide one total by the other.

-- Bruce
Edward Hayes - 31 May 2004 13:01 GMT
Thank you Bruce; Ed Hayes

> > > The mean is the best mileage + lowest mileage divided by 2. The average is
> > > the mileage of each fillup added together divided by the total number of
[quoted text clipped - 12 lines]
>
> -- Bruce
-rick- - 01 Jun 2004 07:11 GMT
> > "Edward Hayes" wrote...

> > > The mean is the best mileage + lowest mileage divided by 2. The average is
> > > the mileage of each fillup added together divided by the total number of
[quoted text clipped - 5 lines]
> Uh, no ... the median is the number where half of the mileages are
> better and half are worse.

Ah, you're absolutely right, sorry for my error.

> And it doesn't make any sense to add up MPG numbers and then divide by
> the number of samples.  Yes, mathematically you can do that and get a
> number, but it's not a useful number.  Just add up all the miles, and
> add up all the gallons, and divide one total by the other.

OK, but that number would be extremely close to the mean given (as the number of
gallons per tank is consistent).  Showing the extent of variation adds
information by bounding the effects of seasonal variations from temperature and
gas formulation changes and a range of traffic congestion conditions.
-rick-
Ignignokt - 31 May 2004 07:22 GMT
> The mean is the best mileage + lowest mileage divided by 2. The
> average is the mileage of each fillup added together divided by the
> total number of fillups. i.e. 23.6+19.3+25.1/3 = 22.66 mpg. Ed

Excerpted from http://www.dictionary.com/search?q=mean:

   "The average value of a set of numbers."

This definition matches the definition in Bookshelf 2000 word for word.

My bound paper dictionary* lists these two definitions among many others:

   "The middle point between two extremes"

and also

   "A number that represents a set of numbers in any of several ways
determined by a rule involving all members of the set: average"

Two of the three dictionaries I consulted don't even bother to mention the
definition you imply, and the one that does mention it is the oldest of the
three.  This and the fact that I wasn't even aware of that meaning (pun
intended) until looking it up leads me to suspect that it's on its way to
becoming archaic.  Combine all this with the fact that the average of the
stated "min" and "max" numbers doesn't match the stated "mean" value, and it
seems likely to me that the OP's use of "mean" was, in fact, the average of
all the fuel economy values.

- Greg Reed

Signature

2001 Chevy Astro AWD (wife's)
2004 Subaru Forester Turbo 5-Speed

* Webster's II New Riverside University Dictionary (c) 1988 by Houghton
Mifflin Company.  ISBN: 0-395-33957-X

                 

BlueSTi - 01 Jun 2004 17:03 GMT
I have been averaging about 22 mpg .  99% of my driving is on the
Interstate at 70 mph.

BlueSTi
"Scary-Fast"
Brent Burton - 27 May 2004 19:37 GMT
| n = 50
| mean = 22.18 mpg
[quoted text clipped - 4 lines]
| US gallons, '02 wrx wagon, 5speed manual, 13mile commute on mostly highway plus
| weekend trips.

My '02 wrx wagon with 36k miles and roof bike racks averages around 21
mpg, which is mostly city and short highway (<15 miles) driving.  Road
trips routinely get 25.

min = 9.5 mpg at a track day
max = 28 mpg at 7000' elevation.

-bpb
 
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