My wife can get 33mpg with my A8L
09-02-2005, 07:35 AM
#3
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Manged to get to 23 mpg from 20 normally.
Lighter foot, reduced speeds and less aggresive use of Tip. Shooting for 25 mpg in combined mostly hwy driving. On 20 minute traffic jams kills the gains pretty quickly though!
09-02-2005, 12:09 PM
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May be something wrong in your fuel system. Because
computer's number are exact numbers from ECU.
Main purpose of ECU is calculate a time of opening fuel injectors.
Capacity of fuel injectors is known and constant, fuel pressure is known and constant, time is calculated. Base on those parameters, result of calculating real fuel consumtion is very accurate.
And trip computer simply take this numbers and devide by distance.
My trip computer very sharp.
Main purpose of ECU is calculate a time of opening fuel injectors.
Capacity of fuel injectors is known and constant, fuel pressure is known and constant, time is calculated. Base on those parameters, result of calculating real fuel consumtion is very accurate.
And trip computer simply take this numbers and devide by distance.
My trip computer very sharp.
09-02-2005, 12:27 PM
#7
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Not exactly
That's what it's suppose to do, then it looks at the 02 sensors and adjusts fuel (that's the long term fuel trim) to where it should be.
Note: My instrument cluster is coded for the UK, and I have my cluster show in imperial gallons, so the mileage is up by about 25% over US gallons.
But then again, when I open my left door, it shows the right door open....
And no, I find it hard to believe that fusiler's A8 is getting 33MPG.
Note: My instrument cluster is coded for the UK, and I have my cluster show in imperial gallons, so the mileage is up by about 25% over US gallons.
But then again, when I open my left door, it shows the right door open....
And no, I find it hard to believe that fusiler's A8 is getting 33MPG.
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09-02-2005, 12:40 PM
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i live way out in the country, heavy traffic day I will pass 4 cars on the way to work. so I have
been averaging 29 MPG over the past week of driving. but I am really really being easy on the gas.
09-02-2005, 01:22 PM
#9
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It is possible. I got real 33 mpg when drove 131 miles and used 3.96 gallons at speed 60 mph.
I set cruise control (tempomat) to 60 mph and drove.
I had '92 a100 2.8, '95 A6 2.8 and '96 A8 3.7q and never had experience that trip computer was wrong. May be no more than 1 mpg on full tank was a difference with my calculation.
May be german automakers have no good knowledge about US unit.
:-)
I had '92 a100 2.8, '95 A6 2.8 and '96 A8 3.7q and never had experience that trip computer was wrong. May be no more than 1 mpg on full tank was a difference with my calculation.
May be german automakers have no good knowledge about US unit.
:-)
09-02-2005, 01:27 PM
#10
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But was it imperial gallons or US gallons?
You are overseas, correct? Unless your instrument cluster is coded to the US, it is reading Imperial gallons.
1 Imperial Gallon = 1.201 U.S. Gallon
1 U.S. Gallon = 0.8327 Imperial Gallon
Now I get it, is this why all the Brits are drunk because their Pints are bigger than ours???
1 Imperial Gallon = 1.201 U.S. Gallon
1 U.S. Gallon = 0.8327 Imperial Gallon
Now I get it, is this why all the Brits are drunk because their Pints are bigger than ours???