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67ChevyRedneck · 09-17-2007, 10:10 AM

There must have been something seriously wrong with my truck. I averaged about 10 with my 67 back when it was a 250/3spd/3.73 with a "highway cruise" speed of 55 I could pull off 12 mpg.

Even with my 350/700R4/3.73 I'm getting 12.5 city avg and about 16 highway.

Personally, I'd rather have the 250 over the 305. I had one in a Z28 and hated the gutless wonder. At least the 250 has lots of peppy torque. They would both probably get very similar fuel mileage #'s.

09-17-2007, 10:10 AM	#14
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Re: 305 v8 or 250 I6 for better mpg There must have been something seriously wrong with my truck. I averaged about 10 with my 67 back when it was a 250/3spd/3.73 with a "highway cruise" speed of 55 I could pull off 12 mpg. Even with my 350/700R4/3.73 I'm getting 12.5 city avg and about 16 highway. Personally, I'd rather have the 250 over the 305. I had one in a Z28 and hated the gutless wonder. At least the 250 has lots of peppy torque. They would both probably get very similar fuel mileage #'s. __________________ Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications! Last edited by 67ChevyRedneck; 09-17-2007 at 10:11 AM.