Yes, Red Line has given me the best results. Not only in this truck but just about everything. I don’t want to sound like a shill for them and I have no affiliation (other than knowing a guy that has worked there forever). I just believe in the product. It’s old school, it hasn’t been cost cut to death or ruined by the EPA like most modern oils. Maybe something better will come along at some point but right now it’s the tops.I appreciate all the help man! Thanks. The viscosity number really pisses me off though. So youre running Redline? And if so is that one of the best options for our trucks in your opinion?
I plan to test the Schaeffer not because I think it will be better than Red Line, but because it will likely be the best API certified oil. Some people are warranty paranoid about using something that isn’t API (like Amsoil SS or Red Line). I am not one of those people.