09 3500lb 3.73 6 spd manual

I tow a 21' toy hauler mainly for work. I travel over the Sierra mainly so lots of grades.

My typical mileage is 10.2 to 11.1. On my more flat runs pulling the trailer I can get up to 14. My outfit loaded is 10,000lbs plus.

On the road not towing my most typical trip to town is 30 miles each way and it ranges from 18 to 20 depending on wind and weather conditions.

My reading are hand calculated. I have never unplugged my egr but am tempted to try.