Well, my Redline oil has arrived. 20-50 for the engine and their V-twin trany oil. I've been running Mobil 1 V-Twin for the past 9 yrs in my Sporty and my 09 Rg and have been happy, but wanted to try their motor oil. Also, been using Spectro 6-speed in my 09 RG for the past 2 yrs and it's mutch better than the F+. however, I've heard the Redline tranny oil flows like 140, but protects like 250. I guess I'll find out in about a month when I do my next service. Good article on trany wear... Red Line Synthetic Oil - V-Twin Transmission Tech: A Better Idea Than Using Motor Oil in Your Transmission Going to keep using F+ in the primary. Ride safe and have fun.