fuel mileage

[jfoj]

Wind resistance/drag has almost more to do with killing fuel economy than the weight.

I pulled a 14 foot enclosed trailer with a fairly flat front vs the pointed front with my 2005 Yukon XL Denali 6.0l and was getting about 10 MPG. Filled the same trailer and loaded the back of the truck on the return trip and there was really no change in fuel economy. Seems like the added weight did not really decrease the fuel economy any more, the sail/parachute that I was pulling had the biggest impact on fuel economy. Seems 10 MPG often tends to be a bottom value to expect on a lot of gasoline vehicle unless you are driving in the mountains, have head winds or exceed 70 MPH.

 

[DenaliCountry]

i have a 2024 tahoe z71 when pulling a tandem 16ft trailer with a sub compact tractor on it running 70 miles a hour got 10.5 miles to gallon does this sound normal?

Yep, I pull a 7x18 Inline Snowmobile trailer and I about 8.5-9 mpg with the cruise set at 72 mph on the highway. I have the 6.2l engine.

 

[WalleyeMikeIII]

I believe aerodynamics are indeed key.
I tow a 4500lb boat regularly and get 13-14 MPH at 70 MPH while doing it.

 

[adventurenali92]

I believe aerodynamics are indeed key.
I tow a 4500lb boat regularly and get 13-14 MPH at 70 MPH while doing it.

I pull a 4300lb sea ray V hull behind my 2006 XL Denali with a 6.0 and I see about the same mileage. But dang you guys hit some serious speed when towing lol. I keep it 65 or below……. But then again the southern California freeways are kinda a nightmare when towing lol.