I have the 2019 2500 that i am trying to get enough mileage on to start some test tows of my TT prior to a long trip in August. After reading the owners manual it states that we need 500 miles before a tow and then 500 miles towing at 50 miles an hour. While I clearly want to get the truck broken in before towing and 500 miles seems reasonable, 500 miles towing at 50 miles an hour does not sound practical or bearable all things considered. So my questions is if the 500 miles at 50 towing actually necessary and what happens if you go lets say 60 rather than 50? 60 give or take a few MPH is about what i usually do on the interstates anyway.