Mileage versus rpm's

[cayoterun]

Originally Posted by kikkegek

over here propane is less then half price of gasoline, so I dont really care about lossing 10% power and mileage..hahaha...

I was just curious why mi highway and city driving are equal in mileage. I guess my rpm's are killing mee..

Wow! With that much difference in price it makes it well worth using propane. Another added advantage of propane is there's very little carbon buildup in engine as well as less emmisions out the exhaust.
It used to be that way here, but no more on cost savings.

City/hiway being the same, I don't have a clue on the 350.
We've used several 454s as work trucks, and the mileage always seemed the same on them, too. I think you could haul them on a trailer and they'd not get over 8-10mpg, regardless.

Good luck on your gearing.
Cayoterun