Surprisingly the poll says more people use HD360, and syn 2 then Redline oil . It's talked about alot ,but I'm thinking people want a lower cost oil that's easier to find. That aside, I see no reason why it work as good as any other 15/50 or 20/50 wt oil. They do have the highest molybdenum count of just about any oil out there, may not want to use it in the primary.,,
The RL MC oil supposedly does have about 5% more additives that the regular RL 20w50. But I use the regular 20w50 and it is fine. It is also $2-3 a quart cheaper.