I was really interested in how this uoa would look. It is by far the most abused fill of oil this truck has seen. I went longer on change than I wanted to, did a lot of heavy towing, etc. This is also the run where I got my loaded trailer stuck at the end of a dirt road, the truck was screaming for 2 hours while I maneuvered out, very high rpm 4x4 up very steep slopes etc. Truck did better than the driver but hey I got it out. I almost called for a wrecker to get me out though.