What is every one getting for fuel mileage with there 400's? And what rpms should i run at about 65 with 3.54 gears?
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I get about a weeks worth of driving. If my odometer worked I'd have a better idea. When I drove it home the day I bought it I used my gps to track miles and I got just over 11 mpg. That was running around 60-65 mph. That was a long trip. with 4.11 gears it seemed like my rpms were screaming. Wish I had a tach.
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