Slant Six mpg's?

memike said
I here you :happy10: I thought I was getting 27 to 29 MPG till I figure the wrong wheel and tire size I am running :-D
It's hard to say unless you have a friend with the correct mph odometer to follow and get a reading at lets say 60 mph . then take a HWY trip for 100 mile then refill the tank and do it again on the way back :happy10:
I am getting 24 on the HWY in my 66 170/ offy 4 bl 390 Holley and split manifolds and I am replacing axle bearing and seals, This might give me an extra mile or two :happy10:
Very good point Sinister 8)

And it's not something I realized until last summer either. I was following my dad out to get some BBQ. When we got there I asked him why he was going so slow and he said he somehow managed to set cruise at EXACTLY 55, and left it there. I was on his a$$ the whole time because I thought he was going 50!

There are a definitely a TON of little variables (like altitude, temp, driving habits) that can have a huge effect on gas mileage.