Hi, I've got a 96 Trans Am with the LT1, currently being upgraded to an LT4 top end. I'm wondering if anyone knows what is the "best" oil for this engine? I ran Mobil 1 5w30 for the first 5k miles or so (bought it at around 99k miles, currently 106k). Oil pressure seemed low so I went with Amsoil 5w30. Oil pressure with that is a bit better and more responsive and it seems generally smoother. However, I'm thinking of switching to either M1 or Amsoil 10w30. In fact there are 5qt jugs of the latter plus Castrol GTX and Quaker state full synth sitting on my shelf right now. Decisions, decisions...if my wife only knew how much I agonize over these things...or how much worry I've put into the fact that there's no moly in Amsoil...she would kill me.