to answer your question, I think that you should use whatever you are most comfortable with using, after all, it's your truck and your money. If you want my 2 cents, I go with what the manufacturer recommends, at least as long as the warranty remains, just to help avoid issue's if there is an oil related problem. With proper documentation the warranty people can't "easily" put the blame on you for not using what they recommend. Again, that's just my 2 cents, everyone has a different way of thinking...