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hmmmmm, call him again? Do you know anything about the truck?
How many miles, oil changes, brakes, maintenance?
A lot of people call them gas hogs, but they get better mileage than most other engines if kept in good order. Use regular spark plugs and good wires.
I should do a warm air intake on mine and see if I gain anything.
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1991 F-250:
4.9L, Mazda 5 speed, 4.10 10.25" rear
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