Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Aerodynamic Suburban or GM SUV (92-99)

rmay635703 · 06-09-2016, 12:04 PM

The most bang for the buck in a suburban is a diesel motor.

Both the 4.3, 5.7 and 6.2 (c-code) motor when put in with a manual transmission will give you the largest increase bone stock 2wd.

Converting it to a true FWD with a manual transaxle adds another 10-20%

So your starting point should be about 30mpg once the original platform is optimized mechanically.

If you don't mind super slow driving drop in a Kubota for up to 50mpg at low speeds.

Then underbelly, fender skirts and the rest after you get the lowest hanging fruit.

06-09-2016, 12:04 PM	#33 (permalink)
rmay635703 home of the odd vehicles Join Date: Jun 2008 Location: Somewhere in WI Posts: 3,891 Silver - '10 Chevy Cobalt XFE Thanks: 506 Thanked 868 Times in 654 Posts	The most bang for the buck in a suburban is a diesel motor. Both the 4.3, 5.7 and 6.2 (c-code) motor when put in with a manual transmission will give you the largest increase bone stock 2wd. Converting it to a true FWD with a manual transaxle adds another 10-20% So your starting point should be about 30mpg once the original platform is optimized mechanically. If you don't mind super slow driving drop in a Kubota for up to 50mpg at low speeds. Then underbelly, fender skirts and the rest after you get the lowest hanging fruit.