Well I made it back from vacation heres some of my milage;

1st tank small rolling hills 8.45mpg Heavy winds in every direction
2nd tank mountain driving and some flats 9.1mpg
3rd tank all mounatin driving lots and lots of hills, almost all up hill on this tank, including the Salmo in BC 7.2mpg
4th tank mountain driving and some flat 8.8mpg

Driving 90-114 KM hauling around 8000lb 25ft fith wheel.

Over all i am rather pleased with my results especially with the power i had.

Recently when i had my minivans and my tent trailer going up the salmo in bc back to Calgary it would take me around 35-40 min to get up. This year with my 8.1 and 5th wheel took me maybe 5-7 minutes. I was passing people going up and they didnt even have a trailer haha, i liked that!

Any questions let me know.

damn, thats pretty good milage, im lucky to get 8mpg when towing my jeep on the flats.

I get better milage on the hightway w/ my 5th wheel then i do empty in the city.

I also have 4.10 gears.

The best mileage I’ve ever gotten with my 10,000lb 32ft long 5vr in tow was pulling down I95 to Florida in February. I was getting around 9.5mpg. The truck felt like it was pulling effortlessly at 70mph. I’m guessing the cold air must of helped.

General depending on terrain I get around 8 to 9.