Thanks for the link. I drive all highway miles with the typical bumper to bumper thrown in. The first tank was on beat tires. Had new tires put on and its still the same. I drive about 70 on the highway.
I just bought a 2012 mega cab 6.7 diesel. I went through 2 tanks of gas and both have netted me about 14MPG. I was under the impression i should be looking at the high teens low 20's. The only mod that is clear is a cold air intake and I don't see a muffler. Any insight as to where I can...
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