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  1. R

    Not happy with MPG

    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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