I have a 1994 60HP Johnson outboard motor. It's a 2-stroke engine with an oil injection reservoir. I've been using non-synthetic Evinrude/Johnson 2 stroke outboard oil that meets (or exceeds) the TCW-3 standards. I've seen the Evinrude Ficht RAM injection synthetic blend 2 cycle oil and have heard that it's a cleaner oil that leaves less carbon deposits in the cylinders. <br /><br />First of all, is it really a better oil to be using? If so and I start using this new synthetic blend oil, do I have to empty the non-synthetic oil from the oil injection reservoir or can I add it to the non-synthetic oil already in the reservoir?