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I read what you posted on the other thread, and you left me enlighten with what you said. I didn't know about the grade when it came to oil. But I'm sold on the Mobil 1 that you use, being it grade IV. Threads like this not only help, and inform the people looking for that answer, but also gives us knowledge, so as a consumer we don't get had. Thanks for the info, there is always somebody with the knowledge. I need to ask you kman. What oil filter do you use? Hey Kman, is the M1 that you talking about on the O'Reilly flyer?
I was thinking off a k&n filter, their washable right? How's the Royal purple working out. Seen any improvements?
Is that what came with the truck, or you had them replaced?