Zax

Hey everyone,
So I haven't read anything on this yet so was just curious, does lowering the truck give it better MPG? I am looking to level mine by removing the rear block and was just wondering if that would do anything at all? I know leveling the front and or lifting them hurts the MPG rating, so just curious about making it lower.

azmidget91

Not sure if you will see much with just lowering the rear. The gains are in the front of the truck, the lower the front, the less air goes underneath it and causes drag. I lowered mine 4.5/5.5 and saw about a 1+mpg improvement. I completely removed the air dam off the front bumper when I lowered it since it was only a couple inches off the ground, but I have contemplated trimming it down and reinstalling it.

HCFX2013

I'd say that neither leveling or lowering affect MPG's per se, but differences in tire diameter will affect it. So I'd say you'd see a very minimal increase as a result of lowering. Air flows under the truck regardless.

Zax

That makes sense. That's kind of what I was thinking, but wanted to ask just for verification purposes. Thanks!

azmidget91

Larger tires do decrease your MPG, but lowering it will definitely increase it. I was around 18.5MPG before I lowered my truck now I get 19-20.

Look at the front of your truck, there is an air dam that hangs down low. That is there for 1 purpose, increase MPG by reducing drag on the under side of the truck.

KMAC0694

Removing blocks probably won't do much at all, but a full 2/4 or 3/5 would give you improvements. Guys that are slammed get much better mileage.

2WDs can be thought of as as 4x4s with a 2/2 drop, and they get slightly better mileage, but between the 400 extra pounds and 2" of extra height, the differences between the two aren't too significant IMO.

papa tiger

Rust up north on the lowered F150 will eat into any gas savings u might see!

Alcoloco

The lower you get to the ground the better the mileage, higher off the ground will give you less mileage. Lower also helps with stability with a lower center of gravity.

Take a look at any race car, Nascar. You can barely fit a sheet of paper under them. Sure, air always goes under but, the smaller the gap, equals less turbulance, less drag and better fuel efficiency.

You probably will be looking at somewhere around 1, maybe 2 mpg.

Sweatmachine

Lowering might help, but slamming it then adding 22" or larger wheels will not help.

REDrum5.0

Feel like for me it has. The same DD routine I was averaging 17-18 now I am 18-19 average after lower by 3/4.