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Old 10-26-2012, 02:59 PM   #19 (permalink)
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Join Date: May 2012
Location: Indiana, US
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TheCav - '04 Chevy Cavalier LS
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I have to add this. When I switched to smaller tires on my cavalier the mpg and the speedometer were effected. It showed me as getting better mpg and my speedometer shower me as going 2-4 mph faster.

So if a larger diameter tire actually shows mpg gains, the gains are also multiplicative because it should decrease your mileage because it shows as your speedometer registering a slightly lower speed.

Anyone understand what I am getting at?
Larger tire shows a decreased speed and decreased miles on odometer.
Smaller tire shows increased speed and increased miles on odometer.

Was this factored into the mileage gains?
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