Ok, seems nobody can agree on weight for the LS chevy engine. I have 3 chevy trucks, a 09 5.3 with 35k on it a 99 with a 4.8 and 194k and a 2000 with a 5.3 and 295k on it. The 2000 is about to get a 6.0 swap and a build. I have run 5w30 and 10w30 in them but with the build and a little bit of street fun and maybe an occasional trip to the drag strip just for fun and was wondering if I could use a xw40 weight in it since the valve train will be under more stress? If not I'll try the 15w30 delo. I have heard lifters will chatter and everything in between. I want to hear from the guys that build and run these motors not sweater vest penny loafer guy who drives a stock Celica.
Thanks
Thanks