A custom tune and e-fans will boost your mpg and power.

Check this out !!!

 

the most noticeable on mine was tuning. my average combined mpg is up from around 15 to 17.5.

 

Remember, we drive heavy trucks with the aerodynamics of well, a brick. I try to tuck in behind other vehicles, especially trucks, on the highway. This usually gains me a couple of miles per gallon. I know, I know. It is tough to drive as slow as the large trucks, but you can't have your cake and eat it too.