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Originally Posted by cmhj2000
FWIW the wifes 06.5 Optima W/Auto gets about 36 on the highway.
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Not bad at all. Mine has 15" wheels and I wonder if it would increase the mileage to do 16" wheels? I doubt it would be cost effective or save enough gas money to pay for the wheels? 93 octane gas won't help because we don't have the built in octane sensor to adjust the timing.