I'm breaking in with Syn3 instead of dino but I'm using redline shockproof heavy in the trans. After 1500 miles I will go to Mobil1vtwin but stick with redline in the trans. SYn3 is a group III synthetic, Mobil1 is a group IV and redline oils are group V. If you read the oil threads there are some definitions posted here about what that all means. BUt you can't go wrong with the Mobil1 products. They are fine.

 

I use gear oil in motor it sound so quiet I cant tell if its running or not!