The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Gas mileage increase- six to BB OD

67ChevyRedneck · 11-30-2018, 10:30 AM

I ran my 250 six for a few years with the stock 3 spd and 3.73 rear and the best I ever got was 11-12. Really liked that motor though. Always lit right off and idled like butter. Kinda mad at myself for yanking it out for a 350 many years ago. Looking back I wish I had just added a T5 behind it.

11-30-2018, 10:30 AM	#8
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Re: Gas mileage increase- six to BB OD I ran my 250 six for a few years with the stock 3 spd and 3.73 rear and the best I ever got was 11-12. Really liked that motor though. Always lit right off and idled like butter. Kinda mad at myself for yanking it out for a 350 many years ago. Looking back I wish I had just added a T5 behind it. __________________ 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!