Well i used the search button and checked the fluids section..couldnt find anything. My cousin has an 08 6.4 F450, and wants me to start doin to maintence on it because the place she has been takin to have been doin half azz job..like most places. So whats a good oil to run in them? Also what is a good filter to use or just stick to the motorcraft filters..? And what is the right size socket for the oil and fuel filters to get the cap off. I tried a 1 1/4 and it was to small.?