No. of Recommendations: 0
"I tested speed affecting mpg on a trip to Panama City (from Athens, GA) one time. I am not good about checking my mpg so I don't know how this trip differs, but I think it was a good case any way. I had expressway or 4-lane divided almost the entire way there. I drove less than the speed limit (sometimes 55, sometimes 60), and managed 34 mpg for my Acura 3.2TL. It has a V6 engine. I was very impressed since it claims only 29 highway mpg. I have heard speeds over 55 really do make a big difference on mpg and I believe it."

I hope you did do a check of the odometer. Many of them are off by 5%, giving you more mpg than you actually are getting.

you need to do at least 20-100 miles of checking what your odomoter says vs the highway mile markers.

The older your tires are, the better your gas mileage gets - as the tires wear down, your MPG goes up. maybe up to 5% by the time your tires are fully worn out and you buy new ones.

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