Shifting early, driving gently, doing 55 MPH max except for drafting behind tractor trailers (1-2 car lengths back), and going as possibe with a minimum speed of 30 MPH. My stock size tires (155/80r13) are overinflated to 50 PSI, I have pizza pan hubcaps, a front lower belly pan, and a grill block with a hole the size of a softball in it for cooling. Other than that it's all driving technique. I don't even have any FE instrumentation yet.
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