Gas mileage 225 Slant 6

I found it depends on how I do the math. I milled the head .100", built some tube headers along with some other minor mods and got 32 MPG doing the math in my head. Put a pencil to paper and it was 22 MPG. So, in thinking about what I just said, I'd say it all depends on how I feeel about my MPG instead of actual mileage. I feel much better when I calculate the mileage in my head.
:lol: