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#528352 - Tue Apr 14 2009 09:52 AM Gas mileage from a 250 6 cylinder
New Guy
Registered: Tue Sep 26 2006 12:00 PM
Posts: 11
Loc: New Albany, Ms
Just wondering if anyone knows what kinda gas mileage to expect from a 69 model Chevy C-10 250 6 cylinder with a 3 speed. I don't know what rear end is under the truck, but it'd be whatever came out from the factory.

1969 Chevy C-10 Fleetside
#528707 - Wed Apr 15 2009 10:34 AM Re: Gas mileage from a 250 6 cylinder [Re: PATRICK RHEA]
Joe H Offline
Shop Shark
Registered: Fri Feb 04 2000 12:00 PM
Posts: 3981
Loc: Lee's Summit Mo. 64086
At 55 mph I would expect somewhere around 14 -16, maybe more if its geared high (3.08, 3.23) maybe less if geared low (4.56, 4.11). Jumping up to 65 or 70 will knock it down 1 or 2 mpg.

1937 Chevrolet Inline-powered Streetrod
#528721 - Wed Apr 15 2009 11:25 AM Re: Gas mileage from a 250 6 cylinder [Re: Joe H]
Roadmarks Offline
Shop Shark
Registered: Tue Oct 30 2007 10:06 AM
Posts: 888
Loc: Raleigh NC USA
I used to get 17-18 mpg with a '75 C-10 with a 250 and a 3 speed.
No idea what rear end it had, but the truck pulled hard all the way. The engine was box stock but no pollution control or cat. I had 30X9.50 15s on the rear on 8" rims on the rear. Faster or a heavy load could cause a big drop in mpg, though. I really enjoyed driving that truck. Now it is a parts doner for my '56, because that's where the same 250 is going.

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1956 Chevy Panel
1969 Chevy C20 Panel Truck
1971 Chevy C-10
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