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Old 06-12-2019, 04:27 PM   #24 (permalink)
eco....something or other
Join Date: Jul 2009
Location: Colfax, WI
Posts: 698

wood hauler - '91 Ford F-250
Team Pontiac
90 day: 18.97 mpg (US)

Rav - '06 Toyota Rav4 Base
90 day: 26.52 mpg (US)
Thanks: 36
Thanked 51 Times in 38 Posts
It takes a certain amount of power to rotate a shaft in bearings. It takes exponentially more to rotate an unbalanced shaft, with the amount of power going up as the shaft imbalance and/or rpm increases.

If I am wrong about the effects on mpg, please tell me where the extra mpg are coming from.

1991 F-250:
4.9L, Mazda 5 speed, 4.10 10.25" rear
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