2020 2500 6.4 Fuel mileage

[Crusty old shellback]

Just did a 875 mile road trip to Baja and back.
4.10 gears and 35x12 50 BFGs.
About 400 miles was with just a medium load in the bed. 275 miles was heavy load in bed and 6K trailer. 200 miles was overloaded bed and 6K trailer. Plus there was about 50 miles of it was pulling up in the mountains, one section was a 11% grade.
Best I saw was 14. Worst was 10. Overall average was 12.
Speeds were from 20 mph in the mountains to some 98 mph with no trailer.

 

[dieselscout80]

I have a 2020 Bighorn 2500 6.4 ccsb with 4.10s and it has 73k miles.

My MPG according to the main display is averaging 16.3 (typically about.7 mpg high). However, my “B” odometer/trip meter has tracked 5751 miles which includes all driving including towing and hauling and it shows 15.9.

I can get 18 mpg at 70 mph using cruise control.

The towing includes hauling my tractor multiple trips, towing a 8k travel trailer about 150 miles and many trips hauling hay/feed for livestock.

The last trip shows my hours.

 

[dieselscout80]

Well I changed oil today and so I reset the b trip odometer and it showed 16.5 MPG over 5588.4 miles.

No travel trailer towing but multiple times pulling my tractor and various other loads.

 

[Rama_Lama]

A question on the MPG numbers that have been provided. Are these numbers with MDS?
I haven’t been using MDS and the I’m averaging 16ish on highway and 15 with mixed.
Completely stock on trashforce tires, did take off chin spoiler 5 minutes after I bought it
2024 3500 CC 3.73

 

[dieselscout80]

A question on the MPG numbers that have been provided. Are these numbers with MDS?
I haven’t been using MDS and the I’m averaging 16ish on highway and 15 with mixed.
Completely stock on trashforce tires, did take off chin spoiler 5 minutes after I bought it
2024 3500 CC 3.73

I’m using the MDS on my truck and I have mild tires General Grabber HD’s that the dealer put on it wit was purchased. Those tires still have 12.7/32” (10mm) of tread depth left after just over 16k miles.