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Old 05-11-2011, 05:57 PM   #29 (permalink)
Angmaar
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It's good to see some MPG "myths" put to the test. Maybe more of the public will understand the importance of tire PSI.

Quote:
Originally Posted by Enginator View Post
Running tire pressure at 45 psi or higher increases danger of loss of control, bouncing and the suspension is NOT tuned for it. It can affect stopping distance. Plus the tires will not last as long.

Last time I checked last fall, about the cheapest tires out there for a GEO for instance were around $50 each and rising. Saving $75 dollars over a year on fuel you would probably burn more than that off the overinflated tires.

Different story for engineered, lowered rolling resistance tires. You will save approximately as much in fuel as the extra cost of the tires. So it is a break even.

Enginator
Actually running your tires at their max PSI will make them last longer. This is because the tread wear is more consistent.
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