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Old 03-25-2013, 10:48 PM   #48 (permalink)
101Volts
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Location: Pennsylvania
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Woody - '90 Mercury Grand Marquis Wagon LS
Last 3: 19.57 mpg (US)

Brick - '99 Chevrolet K2500 Suburban LS
Last 3: 12.94 mpg (US)

M. C. - '01 Chevrolet Impala Base
90 day: 18.73 mpg (US)

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Quote:
Originally Posted by wobombat View Post
I can't imagine how the car would accelerate better with lower pressure tires, unless if your tires under high pressure were skidding and you didn't know it because of traction control and the such.
Concerning the trip there are a lot of factors there. I would never base that sort of mileage discrepency solely on tire pressure. For example, if the car is older, then maybe heavy pulses lead to compression losses. Or maybe you had a headwind and it was a cold, rainy day the latter time, but a tailwind and a clear, warm day the former time.
Although I too may be wrong, and I have no hard data to back myself up. But once I get the scanguage I do want to test that out.
Yes, There are other things I didn't take into consideration; Live and learn. I still have the feeling 45 is more fuel efficient than 50 for the tire and van combo, Though.

And 45 isn't lower than the tire calls for, Maybe 44ish really is the best fuel efficient tire pressure for that tire and car combination.

Last edited by 101Volts; 03-25-2013 at 11:13 PM..
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