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**truckster** · 02-10-2018, 04:52 PM

I put an Olds 455 in a Buick Estate Wagon with a 3.23 rear and it averaged about 11 MPG. I decided to see what kind of mileage I could get out of it once - I got on the freeway and kept it at 60 MPH, never touching the gas. I got 16 MPG, but there was absolutely no fun in driving it that way.

02-10-2018, 04:52 PM	#28
truckster Senior Member Join Date: Jan 2001 Location: Orem, Utah Posts: 7,791	Re: Best fuel efficiency I put an Olds 455 in a Buick Estate Wagon with a 3.23 rear and it averaged about 11 MPG. I decided to see what kind of mileage I could get out of it once - I got on the freeway and kept it at 60 MPH, never touching the gas. I got 16 MPG, but there was absolutely no fun in driving it that way. __________________ I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson