Those engines will typically go over 250K, are you sure you want to junk it over a $100. gasket set? As for break in oil for ATK 5.7 Chevy, I would follow the ATK's break in directions, if they offer a warranty they most likely have a recomended break in procedure that will void warranty if not followed. I would think a premium dino (Pennz LL) 5w30 or 10w30 changed at 500, 1500, 3000 miles then on to regular schedule would be really safe, I like to cut open filters after each change to see whats going on, but I'm very anal with new engines. I think the Vortec uses roller lifters, so no cam break in needed, for flat tappet cams, I like to break in cam, change oil and inspect filter (I know this is anal, but oil and filters are cheap). Thats my penny of two-
[ November 01, 2003, 01:22 PM: Message edited by: Kompressor ]
[ November 01, 2003, 01:22 PM: Message edited by: Kompressor ]