I ended up down a rabbit hole on rock auto just looking at the price of parts, mostly cussing that I pay so much more fo ray imports and saw a supercharger. It's $800 bucks for a reconditioned one but it specifically states to use a 75W-90 oil in it. Now I don' know what the original oil is and if a remanufactured supercharger would use a totally different kind of oil than stock, but I'm seeing 75W-90, I'm seeing 5W-30 and the magical super charger oil that I don't know what it actually is. So, I guess I need to look around and see what is required by GM. I want to go as cost effective as possible but not use the wrong product.