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Yesterday was the first time I towed with the Durmax and pulled my new 5th wheel. Wow what a work horse this is so much better than the half ton and the tag-a-long. I did not get the 12-14 mpg most are claiming on here, however towing a 16,000 lbs trailier from GA to MI at mostly 70 mph I averaged 9 mpg and I am happy with that. Time for the first oil change and the DEF says I have less than 300 miles so I will top that off today.
 

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