Quote:
Originally Posted by MetroMPG
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Yes, and while the data is promising it doesn't give us the direct relation ship of pressure:MPG.
In one of the threads about LRR tires there is an article about upcoming govt standards for LRR tires. They quote a spokesman from the TireRack as saying that a 25% reduction in RR would only result in a 1% increase in MPG.
Using your figures, your biggest avg gain (at 60psi) was 19'. That's a 0.03% increase. WHOOPIE!!!
I think we all took the well documented MPG penalties of under-inflation and extrapolated them equally to over-inflation. Modern radial tire construction probably limits the amount a tire can grow without going to dangerous extremes in pressure.
Unless someone can present reliable data showing a definite increase in MPG related solely to tire over-inflation we might have to declare this eco myth
BUSTED!