Not that I doubt you, but can you expound some on what makes Mobile 1 better than T6. I dont really have oil preference other than I am not going to pay double to get some "Super Oil" per manufacturer's claim mainly because I dont run my tractors that hard and change the oil at recommended intervals. Maybe I would use super oil in my boat engine as I do run it max throttle much of the time.
PS. I also use Fram oil filters in my cars and never had an engine problem.
I have a more than 30 years of quality assurance background. Definition of quality= meeting the specifications. Exceeding the spec does nothing for you except cost you money. Regulations for grades of oil set the standards the oil must meet for each classification. Exceeding those specs does little for you if you change your oil as specified by the manufacturers. If however you want to run 10K miles on your vehicle when the manufacturer says change at 6000 or 7500, you may want to use the super oil.