Quote:

What factor(s) contibute most to lower FE?

1) High speed (the biggest factor)
2) Accessive acceleration
3) Late braking
4) Low tire pressure
5) Rain
6) Cold
7) Headwind
8) Airconditioning (Not outdoor temp, the hotter outside the better)
9) Using the heater
10) Stop and go driving
11) Failing to FAS (a big one)
12) Letting the engine warm up