Compression Ignition Addict
Join Date: Mar 2011
Location: Great Falls, VA
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i dont have experience with the spartan tunes, but the higher HP tunes are going to yield you the best mileage. i would go with the 300 tune.. and try to keep the speed to 70 mph. my higher HP tunes give me the best mileage.
2008 Ford F250 6.4L Crew Cab Short Bed King Ranch
3.5" ReadyLift Leveling Kit, 37x13.5x20 Toyo MT's on stock 20's, Dual Steering Stabilizer, Livewire w/ IDP, KEM, Gearhead, S&B, 5" Flo-Pro, Rudy's EGR Delete and Cold Side Pipe, CCV
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