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x98boardwell x98boardwell is offline
After the next project
 
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Join Date: Sep 2006
Location: Central Valley, CA
Posts: 1,518
Garage
You have wayy to much time on your hands... but I will say what I think it could be.

1) Different driving style on long trips (even though you say it is the same)
2) oil is thicker when cold which make the motor work a little harder
3) car may be running richer when cold which could use more fuel
4) sustained highway driving rather than stop and go at the end and beginning of your short commute.

Just a few things that could affect it. Sounds average to me.

Cheers,
Bryan
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Previous cars:
1987 930, 1975 914 2.0, 1989 944 Turbo S, 1991 964 Targa, 2004 996TT Convertible, 550-6 Spyder with a 2.4 liter twin plug "S-spec'd motor"

Current cars: 2006 Cayenne TTS, 1991 964 Cabrio, 1997 993TT, 1984 Jeep Grand Wagoneer
Old 06-21-2011, 12:12 PM
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