m,y take on the oil is USE WHAT THE BOOK SAYS TO.i have been liveing in the super duty section here and have learned alot about those trucks and what to and what not to put in them. as far as a diy oil change ill post up after i change oil and fillters in my 05 eddy 4x4 with every option in the book.my wife traded one of my chevys in for it 2 days ago.i was pissed but it is a nice ride.tell ya what. you help me figure out my radio /navagation systom and ill help ya on the oil change? lol ...congrats on the new ride.