MPG for Various Class A Motorhomes

tropical36 wrote:

Octaneforce wrote:
My 93 30ft p30 with a tbi 454 chugs right along and achieves 8mpg at 70-75mph. Going slower doesnt seem to help much. I wont go anywhere without adding lucas upper cylinder lubricant to the fuel. I honestly get an extra 1/2 mpg since i started doing that. I also removed the cat. I previously couldnt get more than 7.5 mpg.

I can't even believe that anyone would drive any behemoth that fast, let alone an older gasser.
Besides every thing else, most of these tires, have a max rating of 75mph and having a steer tire blowout, at that speed, can't be any fun, at all.
Also, if your speed has no effect on MPG, then there's some people at MIT, that would be very interested in talking with you, about how you have managed to violate the laws of Physics.
To each his own, on the Lucus lube.

Haha maybe i should have went to college after all. Its definitely a measureable amount better if i go slower (not buy much at all), its just not worth it to me if i can legally go with the flow of traffic. Hey a passenger car doing 80 can blow out a front tire too. Everything is a risk to some degree. I keep my rig very well maintained and look it over before every trip and at every stop. I understand what your saying though. I go slow when its necessary.

The lucas works! Lol it sounds like a hoax but it helps. I also like that it adds some lubricity to the fuel. I need this old chevy big block to last a while!