jimsiggy

I have read several articles regarding MPG gains and tonneau covers. I would like some input from those of you who kept a before and after MPG log and your results. the last 2 tanks i have logged city/hwy agerage16.2 MPG w/o a tonneau. i don’t know my gear ratio and my 5.3 ecsb z71 is stock except for a k&n

Siggy

mzoomora

iTrader: (31)

I gained about 1 mpg on average, but that was also during the break in on my truck, so it is hard to say. Most of it was probably due to the motor "loosening up" some.

SnakeOiler

iTrader: (6)

I have never seen a difference with my tailgate up or down, or with tonneau or before. I keep constant track of my gas mileage.

The biggest change I have ever noticed is with the right foot.

WillPewter2000

iTrader: (1)

1mpg better with cover. I also keep very close track of my gas mileage.

thunder550

iTrader: (70)

No change for me

chris99gmc

nekkidhillbilly

drive it with your tailgate down and you will see the difference.........if you do a lot of 60 and above driving you will see a difference but you wont at 35 in a city.........i saw about a mile or 2 from it

JohnUlaszek

Lowering the tailgate increases turbulence and drag, as per;
http://truck-bed-covers.com/Tonneau_..._save_fuel.htm

maximumrebel1

Yeah that's what I heard also. I've always thought the general consensus on tonneus was 1mpg better. I fully agree though the right foot is the key.

bluecajun5.3

iTrader: (31)

i don't think it helps, just adds weight