what are the benefits of this new imported catroil oil.. what type and weight are u supposed to run, and is it better then my mobile 1 5w30.. if it drops the noise and protects as well, id consider it, by noise i mean teh classic piston slapping ect ect... ls1's have a lil tick to them. i just changed cams after 44k hard miles.. hard hard miles, and my stock cam and valvetrain looked brand spanking new, shiny, with no wear.. u'd think it had 1000 miles on it! it will tkae me a lot to switch, but i am swapping out my fram for prolly a long k&n, or a mobile one, or just anything but fram, shame too, cuz i loved the grip on the bottom..