Recent content by Greg Larsen

  1. G

    Why does RPM affect gas mileage in overdrive vehicles?

    I was reading a post about the effects of RPM on gas mileage, It was from 2007 so I couldn't reply to it. RPM does make a difference on gas mileage when it comes to overdrives. I had an '82 Buick Riviera with a small block engine with an overdrive and a quadrajet that got 26 MPG on the freeway...
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