Re: 2-strokes legal indefinitely?
PECHEUX hit the nail on the head. I have been boating since the early seventies. First boat had a 1959 Elgin outboard that literally shined all over with oil sheen. In the 80's I put 100 to 1 Amsoil 2 cycle oil in it. (100% synthetic) Engine designed to run 20:1. Shine and smoke disappeared, engine ran smoother. Brand new Ranger boat with 150HP Merc, smoked up lake Mead. My Elgin, cranked up, no smoke. Ranger Pilot asked if It was a 4 stroke. Told him about oil, later (two days) same Ranger Pilot, same motor, no smoke. Still run Amsoil 100:1 synthetic in 65 HP Merc, no smoke, no fouling, no wear on engine, no oil slick.
Most oil I've ever seen get into water emitted from bottom end seal leaks, Inboard, Outboard, doesn't matter. If we clean up all of our motors with synthetics, we have done what is necessary for our environment. Amsoil also has had a biodegradable 2 cycle oil, by the way. I know it's biodegradable because it won't last many years on the shelf, in the bottle, use it or lose it!! Synthetics are three times more efficient as lubricants than Petroleum oils. Look for the tried and true brands, however!! (Synthetics have been used as additives for Petroleum Oils for decades, to improve their performance)
