Hi; I'm new at posting here and have been to this site now and then. Anyway I like what I see so far and plan on visiting more often. My question...I notice Mobil 1 makes a "Racing 4T" 10W-40 with 1,600 PPM Phos. & 1,700 PPM Zinc. It notes; specifically for motorcycles where clutch lubrication is also important. From what I've learned so far, this oil most likely don't have any friction modifiers in it because of the motorcycle clutch deal. And most of the time other oils will have friction modifiers. So why am I looking at motorcycle oils? I guess because I lust after the high PPM of Phos. & Zinc. Is the motorcycle oil blends even better for your typical Kawasaki twin cylinder 25HP lawn mower engines even without the friction modifiers? Or am I better off with an oil that has friction modifiers and less Phos.1,100PPM and less Zinc 1,200PPM like the Mobil 1 Turbo Diesel Truck 5W-40 blend?? I know some would say that this is overkill but we are on this site...right?