Lowering effect on fuel economy and stability

[Jessica Smith]

Has anyone noticed any change in fuel economy from lowering the vehicle, or is the reduced drag so small that its not really significant?

Also for those that just level the vehicle with say a 2" rear lowering, at high speed do you notice the vehicle generating more lift without the positive rake angle, or again so insignificant that it can't be felt?

I figured the engineers yacking about active-aero and lowering the vehicle at speed with the optional feature on the 5th gens must have an idea of what they are doing, but I don't know if we're talking about some effort for 0.5mpg or 1-2mpg. Either way I'd probably start with a 2" rear drop if nothing else other than making lift-over height a little better and aesthetics, and I can always toss in some Amazon bags in the springs for the rare times I'm doing heavy towing.

 

[H1Chester]

I had McGaughy's 2" drop springs in for about a year, now have the Belltech 2/4. I have not noticed any difference in fuel economy.

 

[drprymer]

I bought my truck with a 4.5 in lift and 35s and was getting about 16-17 now that its lowered 5/7 i get high 19s-20

 

[rlampman]

I started with stock and lowered to 4/6. I track my mileage both computer and by hand. I use the same route (70 mile work commute) to compare before and after. I saw 1-1.5 mpg less after the drop.