Its been running through my head the last few weeks, just havent gotten to asking it. Obviously when you lift a truck up, the gas milage drops being aerodynamics one of the key reasons. If you lower a truck does it gain any milage increase? If not, does it stay the same, or for some reason, drop?

 

No offense, but if you look at some of the other threads (there's even a DIY thread that states the answer to this), this topic is already covered.

Do a search. You'll find it.