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MPG mustang
A first generation Mustang six with standard 3-speed got about 21 to 22 HWY...actual not hyped. The automatic C-4 running the air conditioner, hauling 2 adults with a weeks luggage got about 20 MPG. My 65 AS MODIFIED got 24 to 25 normal highway driving at normal speeds, using the AC, and sometimes doing 75+...just to stay with traffic. My 65 had much added undercoating, extra foam insulation, the AC compressor was switched from the old York (Hi drag) to a modern Sanden, with an aluminum radiator, fan shroud and flex-fan. Very seldom did I punch the gas because I got into a MPG habit, but it would do well over 100 MPH...DON'T ASK. The 6 was bored to the max at .060", with a new street cam, stock valve job, 2-barrel carb adapted, home built points ignition, 2.83 rear gears driving 15" radials (205x70-15). The C-4 did not have a lockup converter so it probably had between 3 and 5% slippage. My Sunbeam will have a lockup converter and Overdrive transmission with taller than stock tires in the rear. I was proud of my Mustang SIX and put it on the hood.
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