Originally Posted by Redapple
I towed my trailer home with less than 100 miles on my truck. Got over 6k now runs beautiful. Towed three times with it since Nov. last year.
Unfortunately, improper engine break in wear usually don't show up until after 100k miles in the form of high oil usage. On a good note, the current close tolerance specs make breaking in not as critical and besides in the manufacturing process they run each engine full throttle for 60 sec for a factory break in.