gas mileage question?
#18
my friend says he gets better fuel mileage when he drives 70-80 instead of 50-60 on the highway. has anyone else noticed this? he wants to increase his performance and i told him to put gears in the rear end because he has such a high overdrive that he will still have low cruising rpm's. has anyone put gears in and had an increase in mileage driving 70 or below?
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