Only fly in the ointment is what about vehicles that have achieved hundreds of thousands of miles on oil that according to some meet the basic specifications. Even though the oil analysis say this oil is better than that oil....if they both will protect your engine to make to a couple hundred thousand miles what's the point. As far as which flavor of Rotella well if you believe in it keep using it. If it screws your machine up well....now you know. As for me I'm still using my old fashioned formula Honda GN4 non synthetic oil that has provided 80K miles of great service in my motorcycle and my semi synthectic oil in my 229K Toyota Corolla. Better oil choices out there sure but as I said a oil that meets the specs will protect your vehicle to get a couple hundred thousand miles as that has been my experience so i'm thinking lets not think it to deep and do more riding this summer.I suggest to anyone who wants to know about a particular oil to get a VOA done rather than ask for opinions. It is obvious from the Mobil 1 10W40 Auto oil VOA that it will not cause clutch problems but the lower zinc levels could cause more wear or shorter oil life. Of the Motul, Valvoline and Mobil oils listed the Mobil 4T is clearly the best for motorcycle engines.