Ford gas mileage

Since you have no way of knowing how much ethanol is added to your fuel, since some states allow UP TO 10%, your fuel mileage will vary according to the "purity" of your gasoline. In those places where you can get 100% gasoline, you will find that your mileage will increase a few MPG.
The facts are that the amount of ethanol in the fuel that you buy varies each time you purchase fuel. Worrying about something that you cannot control is a waste of time. Drive intelligently and you will get the best mileage possible with each tank of fuel, whether it has 5%, 10%, or zero ethanol.

7.3 pulling a "toad"....7.8 not pulling a "toad". As far as diesels go, first off, the OP is asking about GASSERS.
While i admit a diesel MH is smoother and quieter, so...what about MPG? Yes...I might be 7.5 (average) and you might get 11....but you're paying as much as 50 cents a gallon more! So....where's the money advantage.
Besides, (more than) enough RVers cannot afford a DP (and that's fine.)According to posters here (and other sites) MAINTAINING a DP is alot more expensive than a gasser. Some of the DP (problem) threads here are scary.

Five posts in and no one (yet) has commented on a diesel ? Maybe there is hope....lol !

Hi,

While I normally get about 7 MPG with my 460" V8 1997 Bounder, I did get a huge surprise when I was driving only 55 and started running Chevron 91 octane gas. I got 8.8 MPG. I normally tow a 3,900 pound Ford Edge, but that trip I was towing a 1,800 pound Manx dune buggy. Yet still I had the RV overloaded with all my stuff, I was moving from CA to Oregon.

If you have fuel injection, try running higher octane gas, you should see a mileage increase that is about 10% to 15%. So if the fuel cost is only 4% more than 87 octane, you will see an overall cost per mile go down.

Fred.

Your driving style will have a lot more to do with it than either the Ford or Chevy engine will.

Good info on the MPG. We are still shopping. :)

we get an avg 7-7.5, I use 7 for planning. We have gotten as low as 5.5 avg 74 mph going to Vegas from LA with genset and a/c running full blast trying to keep us cool, to as much as 8.5 up through the central valley going to Yosemite and back. But over all closer to 7. I watch it looking for major change I can't account for, wind grades, traffic etc.

Are you towing anything behind your coach?