[Mr_Draco]

Originally Posted by Marchino

This one is the factory one:
http://www.amazon.com/s/ref=nb_sb_no...1677&x=14&y=22

Here is the factory modifier:
http://www.amazon.com/GM-Performance.../dp/B0056VA9G8

I wouldn't waste money buying the oil just because it says GM on it. My dealer doesn't even sell the GM lube. If you give them that part number and ask them for a quart of it they will pull out a bottle of Mobil 1 like I posted above.