MPG in the range of 6 when pulling a little 27' 5er is something I consider to be a major problem.

 

Whad'a mean? ......lost me there. Do you mean that the Dodge/Cummins only gets 6 to 7 MPG pull'n a 27ft fith-wheel?

 

I got 13 MPG pulling our 32 foot 5er on a LONG trip. Something isn't right.

 

I agree with Superduty...something is wrong and you need to take the truck in. I got a worst of 13 US MPG and average 13.5-15MPG towing my 27' holiday trailer and mines not even broken in yet. I regularily tow through the Rockies to BC and rarely do just easy towing, speeds range from 90-120km/h (55-75mph) . I have an excel spreadsheet of my mileage since day 1 if anyone s interested just PM me.

 

gord: i think we will be at the mustang shop some time this week to do some dynoing, maybe you can make it

 

Whatchya dynoing? Truck or another project? And what day, time, etc?