A6 T2.7 low gas milage

I borrowed a friends 2003 A6 Quatttro turbo for a couple of weeks and took
several short trips in it. I got about 26-27 MPG at 75 MPH on level roads. I
just bought my own 2003 A6 Quattro turbo, with lower mileage (55k vs. 75 k)
than my friends, and I am only getting about 21-22 MPG on the same trips,
also at 75 MPH.

Other than checking the plugs and air filter, what do you suggest I look at
for the cause? The car runs fine by the way, and seems to have plenty of
power.

Thanks,

Don

Don Gunn wrote:
> I borrowed a friends 2003 A6 Quatttro turbo for a couple of weeks and took
> several short trips in it. I got about 26-27 MPG at 75 MPH on level roads. I
> just bought my own 2003 A6 Quattro turbo, with lower mileage (55k vs. 75 k)
> than my friends, and I am only getting about 21-22 MPG on the same trips,
> also at 75 MPH.
>
> Other than checking the plugs and air filter, what do you suggest I look at
> for the cause? The car runs fine by the way, and seems to have plenty of
> power.
>
> Thanks,
>
> Don
>
>
- both cars have same transmission?
- Tire brand and inflation pressure
- Oil type and weight
- fuel grade
- weather conditions and wind speed / direction
- variables in filling the tank
- your engine temperature sensor may be inaccurate
- MAF may be out of spec
- pull your ECU codes

On Sat, 13 Jan 2007 15:00:17 -0600, TonyJ >
wrote:

>
>
>Don Gunn wrote:
>> I borrowed a friends 2003 A6 Quatttro turbo for a couple of weeks and took
>> several short trips in it. I got about 26-27 MPG at 75 MPH on level roads. I
>> just bought my own 2003 A6 Quattro turbo, with lower mileage (55k vs. 75 k)
>> than my friends, and I am only getting about 21-22 MPG on the same trips,
>> also at 75 MPH.
>>
>> Other than checking the plugs and air filter, what do you suggest I look at
>> for the cause? The car runs fine by the way, and seems to have plenty of
>> power.
>>
>> Thanks,
>>
>> Don
>>
>>
>- both cars have same transmission?
>- Tire brand and inflation pressure
>- Oil type and weight
>- fuel grade
>- weather conditions and wind speed / direction
>- variables in filling the tank
>- your engine temperature sensor may be inaccurate
>- MAF may be out of spec
>- pull your ECU codes

Low to mid twenties is what I get with my 2000 A6 2.7T with 6 speed
manual at 75 mph. Actually that is pretty good mileage for a heavy
car. I suspect that there is something out of whack with the friends
A6. Odometer, tank not filled, etc.

I'm surprised at the 26-27 MPG. Your numbers (21-22) are more like it.

"Don Gunn" > wrote in message
. ..
>I borrowed a friends 2003 A6 Quatttro turbo for a couple of weeks and took
>several short trips in it. I got about 26-27 MPG at 75 MPH on level roads.
>I just bought my own 2003 A6 Quattro turbo, with lower mileage (55k vs. 75
>k) than my friends, and I am only getting about 21-22 MPG on the same
>trips, also at 75 MPH.
>
> Other than checking the plugs and air filter, what do you suggest I look
> at for the cause? The car runs fine by the way, and seems to have plenty
> of power.
>
> Thanks,
>
> Don
>

I agree. Overall 65-80 mph mileage is about 24 mpg on my 2004 A6 2.7T S-Line
with Conti ExtremeContact at 40 psi.

"Tony" > wrote in message
. ..
> I'm surprised at the 26-27 MPG. Your numbers (21-22) are more like it.
>
> "Don Gunn" > wrote in message
> . ..
>>I borrowed a friends 2003 A6 Quatttro turbo for a couple of weeks and took
>>several short trips in it. I got about 26-27 MPG at 75 MPH on level roads.
>>I just bought my own 2003 A6 Quattro turbo, with lower mileage (55k vs. 75
>>k) than my friends, and I am only getting about 21-22 MPG on the same
>>trips, also at 75 MPH.
>>
>> Other than checking the plugs and air filter, what do you suggest I look
>> at for the cause? The car runs fine by the way, and seems to have plenty
>> of power.
>>
>> Thanks,
>>
>> Don
>>
>
>

Don Gunn wrote:
> I borrowed a friends 2003 A6 Quatttro turbo for a couple of weeks and took
> several short trips in it. I got about 26-27 MPG at 75 MPH on level roads. I
> just bought my own 2003 A6 Quattro turbo, with lower mileage (55k vs. 75 k)
> than my friends, and I am only getting about 21-22 MPG on the same trips,
> also at 75 MPH.
>
> Other than checking the plugs and air filter, what do you suggest I look at
> for the cause? The car runs fine by the way, and seems to have plenty of
> power.
>
> Thanks,
>
> Don

You can also suspect the breakes. Jack the car and spin the wheels - if
the wheels are tough to move - it might be your problem.

Also possible problem is the wheel alignment. If severed toed-in/out,
you would see it on the MPG reading.

Check the lambda reader as well ( will show up if you read the error
codes)