I work with a guy with your rig. He's got an 05 with Green Diesel and a 2" lift. Belly pans can help make the aero somewhat less horrible and a grille block will help with warmups, but that thing is an aero pig. That tune is the biggest improvement.
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Originally Posted by sheepdog44
Transmission type Efficiency
Manual neutral engine off.100% @∞MPG <----- Fun Fact.
Manual 1:1 gear ratio .......98%
CVT belt ............................88%
Automatic .........................86%
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