Ok so 0W-40 is for track use? Then why is it in the LT1? It’s not even a track car. Lol. The real reason is because they want watered down oils for emissions. Lower weight oils equal better mpg. Every manufacturer is doing this. My Toyota Highlander had 0w-16 in it for crying out loud. It’s getting to be like a limbo stick, how low can you go?
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