Search this forum for "energy conserving" and read the results. Since the clutch and engine share the same crankcase oil, what's good for the engine is not necessarily good for the clutch. Friction modifiers tend to mess up clutch disks. There are varying opinions on the subject. Personally, I use oil for 4 stroke motorcycles, since I'm a weekend/casual rider.
Luke M
Used to have a 1979 CB750L, sold it as a parts bike, now riding a slightly modified 1984 VT700C. Network/Field Engineer. Central OH, USA, Earth, Sol System, Milky Way Galaxy, Universe.