While at WM, I keep seeing the 5 quart jugs of MC 15w40 for 11.50 each. I'm thinking if I go back to the MC 15w40 and purchase the MC oil filter I can do the oil change in my 2002 7.3 for around 46.00, not bad. I am now using the Delo 15w40 with no complaints, and no complaints with the MC 15w40...