Seriously though, as long as you change your oil at recommended change intervals it doesn't really mater much. You can waste hours researching this on the forums and you will find your self going in circles.
Lot's of people here use Redline. I was chugging Amsoil for years before the Z. Problem with that and any other oil that isn't sold off the shelf is that you have to change it yourself. I'm currently using M1 full synth and change out every 3.75K but I'm planning on switching to Pennzoil Ultra. Oil analysis is great and I can find local service that offers it. I figure if it's good enough for Ferrari then it's good enough for the Z.
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