It's been awhile since I've been here, but it's good to be back.
I've searched this site for oil analyses of these 2 oils for LS1's, but can't seem to find an analysis for the 0W40. I have a 99 Camaro SS with 77k on it, and am using 0W40 with K@N filters, but the Autozones here do carry the GC. I know both of these oils are close, but which one would give better wear for LS1's like mine? Mine does slap some when cold but doesn't burn any oil.
Jason
Jason