Class C Gas Mileage

2001 E450 26'
Tow enclosed trailer 55-62mph getting 6.5 MPG
Flat tow Jeep XJ 6.5" lift same speed as above 6.5 MPG
No tow 65-70mph getting 7.5 MPG

Ron,

Just as a gas mileage measurement accuracy reminder - are you still trickle-filling 6 more gallons (after automatic shutoff) into your fuel tank at each fillup? ;)

Our aerodynamic, low profile, 24 footer here averaged 10.6 mpg on our 5500 mile trip from Chicago to WA and lots in between. We did not tow our Jeep Liberty this trip and kept our top speed to 60mph. To be honest I was hoping to break the 11 mpg mark. Oh well.


Our mpg will be better than someone with the same exact rig but lives out west. This because our Great Plains drive improves the overall average than those people driving 100% in the mountains.

Taking an average on a tank full or two means nothing to me. I could claim I get 13 mpg if I tracked one tank full over the flats with a tail wind. But what good is that figure? I could take another tank average that yielded 8 mpg when climbing up & down mountains all day.

For me it's "Trip Average", not "tank average".

:B

Kit Carson wrote:

Dakzuki wrote:
15 mpg

hehehehehehe

Dakzuki wrote:
15 mpg

hehehehehehe

10.3 MPG Imperial is 8.6 US, for those wondering.

Factors include hilly versus flat ground, altitude, tire pressure, all up weight/rolling resistance of vehicle, headwinds vs tailwinds and speeds over 55mph. Aerodynamic drag effects of massive frontal area of typical class C's, goes way up with speed. Notice how many big rigs have an streamlined fairing over the tractor part.

We get 7-9 mpg average and try to drive economically, where practical,rattling along in the right lane and letting cars whiz by.

I am 1/3 of the way thru a 7,500 mile trip (Ottawa, Ontario - Edmonton, Alberta, - Mount Rushmore, Chicago and return to Ottawa). Having kept meticulous records I can say that I have averaged 10.3 mpg (imperial).

Along the north shores of Lake Huron and Lake Superior (very, very hilly with many changes of elevation) I only achieved about 8mpg. I am now on the prairies, which is so flat you can see your dog running away for three days, I now get about 15 mpg. The average is 10.3.

I drive about 90 kph (~56 mph).

In "The Pas" Manitoba gas was $1.69/litre and in Alberta it is $1.08. Now that I am in the flatlands and getting better mileage gas is cheap!

cmalberto wrote:
My first tank was 6.2 - then I slowed down to 65 or less. My second tank was 7.6. I bought a Scangauge to monitor real time. That helped alot. I was around 8.5 on my run that day(60 miles) before I filled up(above second tank). Now that was the Scangauge telling me that and not actual but I suspect it's close enough to understand how to influence the mileage. The last leg to my dealer across Houston was around 9.8...and I was less than 60 and more like 55 due to traffic.

Some observations....smooth interstate roads perform better than the 2-lanes; finding an 18 wheeler to hide behind creates some interesting drafts - smooth and seems to pull you along....mpg increases here too.

If you are close enough to an 18 wheeler to make a difference in your mileage you have a serious death wish. Been out for nearly six weeks with our new(to us) 24' Nexus V-10. Best mileage 10.56 from central Utah south along I15 down to Mesquite Nevada - worst mileage Orem Utah south on I15 into a 35 (with gusts to 50 mph headwind), we gave up after 100 miles and got off the interstate. Yuba SP is very nice but colder than a... well you know. After 3700 miles our average mileage ranged between 9.5 - 10.5. (I set the cruise control at 60).

rdlawson wrote:
I have a Class C 1997 Ford F350 V10 Triton 6.8L, that only gets 6 mpg on a good day. No matter if I tow a car or not. It is 32' long. New air filter, oil change, and the brakes are not sticking. Use Sea Foam treatment is gas tank. Any ideas why the mileage is so bad?

Our 24' 2011 Ford E350 gets 8.5 mpg on short trips and 12 mpg on longer trips. No toad.