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5EFE · 10-14-2009, 06:32 AM

Wasn't sure where to put this. I suppose Fossil Fuel Free works since it would be running pure vegetable oil.....

I believe it is possible to get not only good, but fantastic mileage out of a Chevrolet Suburban. Last year I bought a 1990 GMC 'Burb with 4WD, a 3 speed TH400 and a 6.2 diesel. Despite being automatic, lifted, massive, heavy and as aerodynamic as a semi, it returned about 20mpg, not bad for three tons of American steel. I've heard of owners getting 22-24mpg. I like the 6.2 because it sounds great, and was built for economy rather than power (only 130hp/240tq). Unfortunately that truck caught fire and was sold for scrap, putting my dream of a WVO burner on hold for a year.

Anyways....... one day I would like to get another and: install 5 speed (a rare factory option) lower it as much as possible, change rear axle to lowest availible ratio, make a full belly pan, gut interior completely, remove 40 gallon fuel tank and replace with internal plastic 35 gallon tank, headers, maybe a Banks turbo (another factory option). With these mods and the other usuals I don't think that 35mpg is out of reach, who knows maybe even 45 could be done on a long stretch of Utah road.

Does anyone here have any hypermilling success stories with the 6.2 or any other V8?

10-14-2009, 06:32 AM	#1 (permalink)
5EFE 75mpg or bust Join Date: Sep 2009 Location: Grants Pass and Medford Oregon Posts: 32 Chelsea - '97 Toyota Tercel CE 90 day: 58.36 mpg (US) Victorinox - '00 Victorinox 241000 90 day: 29.1 mpg (US) Thanks: 0 Thanked 1 Time in 1 Post	The 35mpg Suburban Wasn't sure where to put this. I suppose Fossil Fuel Free works since it would be running pure vegetable oil..... I believe it is possible to get not only good, but fantastic mileage out of a Chevrolet Suburban. Last year I bought a 1990 GMC 'Burb with 4WD, a 3 speed TH400 and a 6.2 diesel. Despite being automatic, lifted, massive, heavy and as aerodynamic as a semi, it returned about 20mpg, not bad for three tons of American steel. I've heard of owners getting 22-24mpg. I like the 6.2 because it sounds great, and was built for economy rather than power (only 130hp/240tq). Unfortunately that truck caught fire and was sold for scrap, putting my dream of a WVO burner on hold for a year. Anyways....... one day I would like to get another and: install 5 speed (a rare factory option) lower it as much as possible, change rear axle to lowest availible ratio, make a full belly pan, gut interior completely, remove 40 gallon fuel tank and replace with internal plastic 35 gallon tank, headers, maybe a Banks turbo (another factory option). With these mods and the other usuals I don't think that 35mpg is out of reach, who knows maybe even 45 could be done on a long stretch of Utah road. Does anyone here have any hypermilling success stories with the 6.2 or any other V8?