09 corolla le automatic, tires 38psi a/c on
I have been able to confirm my average with a few fill ups....seems the scan guage is maybe a couple of miles overly optimistic but fairly accurate. the bottem line is you must utilize coasting to break into the mid forties but it can easily be done. my favorite so far is shifting in to neutral on inclines, keeps high speed up, keeps drivers behind me happy
here are the numbers:
just thought I would elaborate on what the built in scan guage in the 09 corolla is telling me.
from dead stop hard acceleration : (7 to 9 mpg)
when the car is already in motion:
acelerating on even pavement ( 26 to 27 mpg)
accelerating up hill (16 to 17 mpg)
steady speed 45mph :
uphill (35 to 38 mpg)
even pavement (41 to 43)
Coasting (any speed) 99.9
coasting in neutral 99.9
So obviously your average will depend largely on your terrain, how fast you drive and alot on how much you take advantage of hills to coast. If you even try a little bit though you will break into the lower 40s in this car, I got 47 mpg average again this morning.