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Achieving the very best mileage from a full size truck is a challenge. Most gains will be small but they will soon begin to add up to some good results. I have been improving my 1999 F 150 since last October.
I started with an antenna delete and synthetic oils in engine, transmission and rear end. Also a synthetic grease in the front wheel bearings. Running the tires at max inflation pressure is always a good choice. When tires are in need of replacement, a high sidewall pressure tire with good LRR can really kick things up. Grill blocks are quick and easy to do. A front air dam is a bit more work but will help. Get rid of all of the excess weight that you can. Spare tire removal from a full size truck is a nice weight reduction. Sure is nice when the fuel gauge slows down or seems to not move near as much.
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