My cat's mileage
My first Cougar was a 72 Standard, waaaaay back in 1976. I was more concerned with it getting me back and forth to Ohio State than anything else, so it stayed bone stock -- 351C-2V. With the 2.75 or 3.00 rear gears it had, I was getting somewhere near 18.5mpg on the highway. I didn't think that was all that good since we had a bunch of full size GMs (Olds Delta Customs) with 455s that got about the same mileage or better. I was never able to get the darned thing tuned up properly until just before I sold it. Oh,
then it would light up the right rear tire

.
AlphaCat only got about 12mpg, but that was when it was still the old tired engine. I don't know what it will get now....
BetaCat was good for around 16mpg with the 3.25 gears, but that dropped to 14 with the 3.70s.
YMMV
Milo
P.S. When I get AlphaCat back on the road I think the more appropriate term I'll be concerned about is not miles per gallon but miles per set of rear tires. I have 18 years of pent up LFD that I need to get rid of! Muahahahaha
