Fuel mileage - The 1947 - Present Chevrolet & GMC Truck Message Board Network

one9six9 · 05-23-2007, 08:58 PM

I know that this is a topic that I shouldn't be conserned with, but with the price of gas I am very curious.
I have a 69 with an I6, three speed auto, and a 308 rear end. What can I expect for highway RPM, and all around fuel consumption? I will have 255/70 tires on the truck too.
I know not to expect much, but with the I6 I was looking for at least 15 mpg city. Is this realistic? I hate to think that I was building a truck that I will not be able to afford to drive.

Thanks,
Keith

05-23-2007, 08:58 PM	#1
one9six9 Junior Member Join Date: May 2007 Location: Milton, FL Posts: 64	Fuel mileage I know that this is a topic that I shouldn't be conserned with, but with the price of gas I am very curious. I have a 69 with an I6, three speed auto, and a 308 rear end. What can I expect for highway RPM, and all around fuel consumption? I will have 255/70 tires on the truck too. I know not to expect much, but with the I6 I was looking for at least 15 mpg city. Is this realistic? I hate to think that I was building a truck that I will not be able to afford to drive. Thanks, Keith

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