Anyone ever run 50w motor oil in their SM465. I have run it for about a year and don't really notice much of a difference as far as shift ease goes. I heard that it can help shifting exspecially when its cold. I'm sure the majority here runs gear lube, but I wanted to if 50w oil can have any adverse effects on the tranny. BTW: The 50w I run is the Vavoline Synthetic Race Oil if it makes any difference.