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Originally Posted by Zac
Do you use 91+ octane?
What RPM are you at when on highway speeds?
What highway speeds do you cruise at?
Have you ran an injector cleaner recently?
Is your air filter dirty?
Have you checked spark plugs for fouling?
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I am usually going 70 -80 on the highway, so I would say between 2500 and 3500 RPM. I'm guessing the EPA rating is at 60-65 and above that my mileage will go to crap, and that there is nothing wrong with the car, but with my driving.