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chevymotocross · 03-26-2008, 04:24 AM

87 Silverado swb 2wd
engine: high mileage 305 TBI
transmission: 700r4
tires: 265/75/15
gear ratio: not sure, but probably pretty high highway gears

I'm only getting about 12 mpg driving pretty easily. I'm a bit dissapointed since I thought the tbi would get a bit better mileage but it does have some pretty big tires, which I plan on dropping to a 255/70/15, and the motor is a bit tired.

03-26-2008, 04:24 AM	#14
chevymotocross Registered User Join Date: May 2007 Location: East Haven, CT Posts: 882	Re: Fuel efficiency...what MPG do you get? 87 Silverado swb 2wd engine: high mileage 305 TBI transmission: 700r4 tires: 265/75/15 gear ratio: not sure, but probably pretty high highway gears I'm only getting about 12 mpg driving pretty easily. I'm a bit dissapointed since I thought the tbi would get a bit better mileage but it does have some pretty big tires, which I plan on dropping to a 255/70/15, and the motor is a bit tired.