Rolling resistance is a factor too!
I changed my stock tires from the Bridgestone 185/55/R16 to Goodyear Assurance FuelMax 205/50/R16 for increased mpg.
It did actually go up about 2 mpg.
I think these tires are heavier. I kept the stock wheels. I was considering lighter 16" wheels but can't afford it. That would have helped a little.
For these slightly heavier, bigger tires I don't notice an acceleration loss. If there is any, I can't tell. I don't drive spiritedly, just for mpg.
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**formerly:
2009 Taffeta White Sport m/t
2007 Vivid Blue Pearl Sport m/t
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