Long Haul with boat

[Padraig]

Have hauled my 6,000 # boat before but this time it will be to Bolton Landing NY, about a 420 mile haul. I will be leaving it there for a engine rebuild and a few more added horses . I have filled up the DEF and have a spare 2.5 gallon container packed. I have read that hauling a load increases DEF use. Am I covered with a full tank and a spare? Driving a 2023 Suburban. Longest trip, till now has been 120 miles.

Padraig

 

[shadeandsound]

I don't tow and likely won't, but it seems to me that the additional DEF usage others have indicated is nowhere near what you are already prepared for. With a full DEF tank and a spare 2.5 gallon container, it seems like you should be perfectly fine outside of a malfuntion like an incorrect level reading (which I guess is possible).

 

[Stbentoak]

I'd probably just plan on refueling at truck stops where you can get diesel and DEF at the same dispenser. With a heavier tow I would probably fill both of them up at every stop. It's pretty simple and eliminates the possibility of running out of each. Keeping a 2.5 in the back never hurts, but as long as you fill both at each stop there shouldn't be any problems.

 

[Padraig]

Thanks everyone. Just got back. Trip was about 850 miles. With mostly 4 lane roads. Much of it hilly. Drove, mostly on cruise at 68 while towing boat. Coming home, dead head at 73 mph. DEF was no problem, used only 1 bar. LOL I guess I worried needlessly. Very pleased with this Duramax! Hauling the boat about 420 miles the avg mpg was 17.5. Avg for with and without boat was 22 mpg. I have had Suburbans since the early 90s but this is the best

Padraig