Compression Ignition Addict
Join Date: Sep 2007
Location: Versailles, KY
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Best way to get your MPG up is to change your driving style, and that doesn't cost you anything but a little time. Back when #2 got hideously priced, I put some work into finding the most economical way to operate my F350.
In town is where the big savings are. Take off slow, no more than 10psi boost, avoid fast stops. If you see a light change, get off the fuel now, let it coast down. 2k RPM is the sweet spot on the road, depending on your gearing that will be 63-70mph. With my 06 that has 4.10 gearing, it really drank the stuff if I got it over 65, delivered around 20-21 at 50-55, 17 at 65, 14 at 75. And that's with a crew cab and dually rear.
I was seeing avg 12mpg driving to work. With all that, I got it up to around 18. A 28 commute became a 33 minute commute, but I figure at $4.50/gallon, I was saving $5 in fuel while taking 5 minutes more. That came out to $60/hour savings, pretty good pay for sitting on my tail.
Big tires are a tradeoff. You up your gearing, but you also increase your spinning weight. Comes out slightly lower, I lost a couple MPG with previous trucks when I went to large mud tires.
Haven't lifted my F350 but I did lift a Chevy with the old 6.2 diesel some years ago. Didn't affect in town, but it hurt highway mileage.
"Big Duke": 06 F350 King Ranch
long bed, crew cab, dualies