Everyone knows Troy favors the Redline and I'm inclined to believe him. However, I have ACL bearings with extra clearance so I am concerned that the 5w50 would be too thin for the extra clearance. But when I compare the stats for Motul 8100 x-power 10x60 (what Lang Racing put in after the bearing job) with Redline 5w50 they seem extremely close; the Redline is thick! Far closer than than Motul compared to Redline 10w60. I like the concept of how clean the Redline seems to make everything. Can I just be comfortable with the thinner 5w50 knowing it really isn't thinner based on the stat sheet? I'm overly concerned about this because my commute is short so this car gets a lot of short, relatively cold (engine temp) drives. Thanks for the insight everyone.