dont do it.i keep forgetting to keep my gas receipts so i dont have any solid figures to give a good estimate of my mpg but i was wondering... i have have an automatic, does manually downshifting affect gas mileage in any way?
my truck gets almost 16mpg in town and 20.2mpg on the highway....Engine: 4.6L SOHC
City MPG: 10-12
Highway MPG: 12-15
Fuel Used: 87
Average highway speed: 65.2Mph
Average Climate: Winter gets down in the twenties with snow summer gets up into the 80's and 90's.
Mechanical Mods: None
Milage on the engine: 160K
Notes: I have a bad O2 sensor.
might have answered my own question. i got 12mpg on my last tank. compared to about 18-20 when i wasnt manually shifting at all. i was late to work quite a bit but wow that is out of control.i have have an automatic, does manually downshifting affect gas mileage in any way?