So while I wait for my radiator to get replaced, I thought I would ask this question, When towing my fiver (10500lbs) I usually run about 1950 on the tach. Seems a little high, My last truck would run about 1500 or so. It was a 5.9 with a 3.73 rear, This F350 is a 4.10 rear. I get about 10 mpg towing and my Dodge got around 12. I realize this is a bigger truck and all, Does this all seem normal? or should I be getting a little better on the MPG. Truck is stock, no deletes yet.

Thanks.

 

Lot of variables in the equation. I don't see any problem with your numbers.

Steve

 

At what speed are you getting 1950 revs? On my '05, I'm at 2000 at 70MPH. Or dang close to it.

 

I generally tow at 60-63 mph.

 

Tire size and rear end ratio also play a role in determining RPM. I think your numbers are withing normal drivetrain variance.

Steve

 

It is setup for max torgue which If I recall is made at 2K rpms.

I have 3.73 gears and at 65 I am running around 1800 rpms.

It is right where it should be with the 6.4.

 

I have a 99 PSD F-350 DRW with 4.10 as well. I run just over 2k at 65mph and get 10 mpg pulling a 5th wheel or camper and trailer. I am under the impression I should get better than 10 but it seems a lot of us end up at that mark.

 

You are fine. I get an average of 12mpg towing at 65mph with 3:73 gears. I plan on swapping out to 4:10 gears fr and rr when I install a Detroit Locker.
Mike

 

Thanks for the replies, Good to have something to compare by. I would love to eek out a few more MPGs but since it's near what my Dodge got, DW aint to mad... lol