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Message: [QUOTE="Arisley, post: 109935, member: 67"] Amputate about half of right foot. What Tarm said is the best advice yet. These trucks get their best mileage below 2K RPM's. 1600 is the magic number on my truck, but with 4:10's that is about 45MPH. I can get on the freeway and drive at 65MPH 2050 RPM's for a long drive and get 23 miles per gallon. That's from my house to Lubbuck, drive around to all of our stores there and back home on a tank of fuel. Over 800 miles round trip. If I drive 70, my mileage drops to about 18, anything over that and it just sucks. Acceleration from a stop will kill mileage also. 3 or 4 1/4 mile runs will suck my tank down a lot. Just my normal day to day driving in the DFW metroplex, I will average 17 MPG over several tanks. You have to remember though at least once a week, I will get stuck in a traffic jam and take an hour and a half to go 5 or 6 miles. [/QUOTE]

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