Lifted, big rubber = gas mileage?

[ThunderMug95]

Hwy @70mph on stock 265/70/17 I averaged 21-22mpg. Leveled and jumped to 305/55/20’s and I am at about 17-18mpg... HUGE difference in footprint and friction...but it brings a smile to my face despite the wail of my wallet...

 

[MarshRam]

Have a 6" lift and 35" M/T's, average about 13 MPG (hand calculated, the cluster lies) . Half my daily drive is 70-80mph, and the home commute is usually against the wind 10-15mph on average. And I got other mods on my truck aside from the lift that don't help with aerodynamics, I lost 1 MPG if not more from those. I think I would probably average the same if I drove city all the time. 3.21 gears and some bolt on performance mods for me.

 

[West27]

Have read lots about the E-fan, wonder exactly what the fuel gains would be with this mod?

I have ran a lot of different tests with and without the clutch fan and I average around ~1 mpg better with it off. In town and highway without a load I always have it off. If I tow I put it back on since the little efan isn’t enough to keep it from over heating. Very easy to put on and off though.

 

[darren Toth]

I have ran a lot of different tests with and without the clutch fan and I average around ~1 mpg better with it off. In town and highway without a load I always have it off. If I tow I put it back on since the little efan isn’t enough to keep it from over heating. Very easy to put on and off though.

Thanks very much for supplying this info on the fan West27!

 

[darren Toth]

Hwy @70mph on stock 265/70/17 I averaged 21-22mpg. Leveled and jumped to 305/55/20’s and I am at about 17-18mpg... HUGE difference in footprint and friction...but it brings a smile to my face despite the wail of my wallet...

Ya I think I lost around 5mpg going with the lift and bigger meat also. I agree that the new look overrides the loss in mileage , lol