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apprentice1 · 06-06-2014, 04:11 AM

I personally have a 1996 Suburban 4x4 with the oem running boards, external sun visor, and brush guard, so it punches a big hole through the air. The only mod I have is a grill block. It is rated 11/16 on fueleconomy.gov. In summer I have achieved 15.3 mpg in what I call "city" driving...although it might be better looked at as combined. This was with p&g, coasting in neutral. I don't really drive highway, but the one time I did a long trip I got 15 mpg with greatly varying driving styles and speeds, and temps below zero.

A friend has a 1998(?) Tahoe... it drives a lot nicer than a suburban, you can feel that it is a lot lighter. He claims he has seen up to 20mpg on the highway...but I wouldn't be surprised if he was driving kinda slow.

My Dad had a 2000 GMC Yukon (GMT800). He claimed up to 20mpg was possible on the highway, but if your cruising on the Interstate probably 16mpg is more realistic.

Hopefully these numbers help...if you have any further questions about the 3 vehicles I have mentioned I could try to get you more detailed info.

06-06-2014, 04:11 AM	#8 (permalink)
apprentice1 Unrealistic goals :) Join Date: Oct 2012 Location: North of 60, Canada Posts: 4 Bob - '95 Chevrolet C1500 Silverado 90 day: 14.79 mpg (US) Shirley - '72 Oldsmobile Vista Cruiser 90 day: 13.42 mpg (US) Thanks: 1 Thanked 0 Times in 0 Posts	I personally have a 1996 Suburban 4x4 with the oem running boards, external sun visor, and brush guard, so it punches a big hole through the air. The only mod I have is a grill block. It is rated 11/16 on fueleconomy.gov. In summer I have achieved 15.3 mpg in what I call "city" driving...although it might be better looked at as combined. This was with p&g, coasting in neutral. I don't really drive highway, but the one time I did a long trip I got 15 mpg with greatly varying driving styles and speeds, and temps below zero. A friend has a 1998(?) Tahoe... it drives a lot nicer than a suburban, you can feel that it is a lot lighter. He claims he has seen up to 20mpg on the highway...but I wouldn't be surprised if he was driving kinda slow. My Dad had a 2000 GMC Yukon (GMT800). He claimed up to 20mpg was possible on the highway, but if your cruising on the Interstate probably 16mpg is more realistic. Hopefully these numbers help...if you have any further questions about the 3 vehicles I have mentioned I could try to get you more detailed info.