I have been running royal purple products in my vehicles for some time...oil, atf, antifreeze additive, gear oil, etc. I have had good luck. I noticed that they have recently added a motorcycle specific oil. Anybody have any experiece? I know one of the Professors at NCSU in the aerospace engineering program that conducted the experiment that is quoted on their webpage. He said they had great success, but as I just got my first bike last week (X-mas present from my wife) I just want to do what is best for my bike.