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60+ (hot) so that i can be certain to be 10 overmax sidewall (45) in most cooler conditions. Ten over max sidewall was what MetroMPG test and found the max benefit. Been doing that for 3 years, 12000-15000 miles/year.
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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