Re: Fuel Mileage
 

Art, a friend of mine has a newer 550 with the automatic and 4.88's and he has complained that he gets 7mpg towing a camper on the interstate. He just got back from the beach and drove the "old" two lane slow road this time and doubled his milage. I know a few guys with the 6.4's and they all really complain about them being gas hogs. At least with the 7.3 you have a MUCH more reliable engine than the later model Ford engines.Don Jackson

Re: Fuel Mileage
 

Any word on Nose cone usage to reduce drag on Motor homes?

Re: Fuel Mileage
 

A lot of guys with the '07 & '08 Duramax and Powerstrokes are crying. The particle filters, mostly their filter cleaning mode, kills mileage. They tell me they are getting gasoline-type mileage. 2006 appears to be the last good gas mileage Duramax. One friend traded a 200,000 mile 2000 Ford for a new Chevy and almost cut his mileage in half. He ain't happy. They make "off-road" pipes that replace all that, but that is illegal and your warantee goes out the window. Don't want to tune or "chip" one either. The '07 & '08 Duramax ECM stores a record of the last ten calibrations it has seen. Warantee work could include the dealer downloading that info for GM Powertrain to look at. Good by warantee. The only way to get around tuning one is to buy a new extra ECM for the tuning, and keep the orignal unmolested box to be reinstalled before it goes in for warantee work.

My '04 GM 8.1L gas motorhome will get about 9 or 9.5 if there is no wind (not many trips so far this year with no wind) and 65 mph. Buy some E10 gasoline and it gets about 7 to 7.5. Wind blows and E10, 5.8 to 6.2. At 75 mph, about 8 with straight gasoline and no wind. Tail wind? Ain't seen one yet this year. Running 75 mph, E10 in the tank and wind blowing, I don't even want to look. Got to thinking I should have bitten the bullet and bought a diesel pusher, until I talked to some guys that have them, and thier mileage is no better than mine. Their fuel also cost more.

Re: Fuel Mileage
 

yeah but they don't have to listen to the motor screaming the whole trip - my 7.4L GM has an exhaust leak at the manifold (rare occurrence on them!!) so it's even more annoying.

Re: Fuel Mileage
 

I pull my trailer which is a Pace American with a Diesel Pusher, powered by a 350 hp Cummins and i get 9 mpg if i don't drive like an idiot, at 63mph. At 70 i get 7.5mpg! By the way my trailer weighs 12.000#. It's a Big Foot,28ft. Anybody ever been told about the Pace racers help program? At Joliet points race i tore the right fender off in the land of Lincoln's new toll booth's, 3" in clearence each side! At the track the guy's from Pace had there trailer there and checking Pace owners if they needed anything! To which my friend Wally Kreuger tells them about my problem. They looked at my fender,took off the old, and put a new fender on at no charge,Thank You Pace!!!!!!!!!!!!! John Lang, sorry i got long winded.

Re: Fuel Mileage
 

2008 V8 4runner 10mpg pulling a 7000+ pound 24" Vintage enclosed from Massachusetts to MIR and back with whatever 87 octane gas I could get...tried to keep it at 60-65.....not look at the MPG setting...

Re: Fuel Mileage
 

At 65 mph my engine is turning 2200. Can't hear it inside. Usually tow 70 to 75, however. My trailer is only a 24' ATC aluminium tag. Nothing heavy, thank goodness.

Re: Fuel Mileage
 

I have a 04 C4500 Kodiak with the Duramax. The truck alone weighs 11,000 lbs. Gets 13 empty. Got 9 towing my 38' trailer with one car, added about 11,000 lbs to it. Get 8 towing 2 cars in a 48', added about 17,000 lbs to it. That's at 65 mph.