The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - What kind of gas mileage do you get with your 67-72?

Zone47 · 10-01-2018, 02:52 PM

... and what is your engine/tranny/rear end ratio?

I know most people don't care about fuel mileage but I noticed my 68 C10 was sucking gas like crazy so I started checking and am only getting 10.5 mpg.

I'm just puttering around town and to a few car shows now and then, nothing fast or aggressive.

So my setup is a 350 with pretty much stock cam and crappy 8.5:1 compression, an Edelbrock (quadrajet type) carb and headers. The tranny is a Turbo 400/stock torque converter and the rear end is a 12 bolt 3:08 limited slip.

I was thinking this truck sould normally get around 14 or 15 mpg. Maybe it's because the tires are larger and the body is not aerodynamic?

Ok so waddaya got and what's your mileage looking like?

10-01-2018, 02:52 PM	#1
Zone47 Registered User Join Date: Sep 2014 Location: Richfield, Oh Posts: 112	What kind of gas mileage do you get with your 67-72? ... and what is your engine/tranny/rear end ratio? I know most people don't care about fuel mileage but I noticed my 68 C10 was sucking gas like crazy so I started checking and am only getting 10.5 mpg. I'm just puttering around town and to a few car shows now and then, nothing fast or aggressive. So my setup is a 350 with pretty much stock cam and crappy 8.5:1 compression, an Edelbrock (quadrajet type) carb and headers. The tranny is a Turbo 400/stock torque converter and the rear end is a 12 bolt 3:08 limited slip. I was thinking this truck sould normally get around 14 or 15 mpg. Maybe it's because the tires are larger and the body is not aerodynamic? Ok so waddaya got and what's your mileage looking like?