Quote:
Originally Posted by The Other Andy
I am floored. Tire pressures at GM recommended 33 psi, no mods of any kind. My drive to work (uphill, roughly 18 miles) got me 34mpg according to the trip computer. My drive back? 37. Granted, trip computers are generally a bit optimistic, but that's a very nice number, especially compared to the 26-27 I could usually pull out of Norm on that drive.
I filled up tonight, so we'll see what the extra weight does.
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My XFE was averaging 50mpg in the summer
But 50psi in the tires.
Maybe an XMSN swap is in line
Also on my cobalt at least the trip meter was +/- 3mpg close enough to say it was neutral.