Found a few threads through search on here, no real definite answers though. Gonna do an oil change tomorrow and was wondering if sticking with the factory recommended 5w20 or going to something like 5w30 or 10w30. I'm at 600 HP to the wheels, but I don't beat on it or ever track it. I was thinking 5w30 but wanted some opinions. Best bet probably to call VMP and see what they recommend.