1994 Johnson/Evinrude Outboards 40 thru 55 Service Manual, Page 26Get this manual
FuelOil Ratios Lubricant Only the following lubricants should be used: Evinrude TC-W3 Outboard Lubricant Johnson TC-W3 Outboard Lubricant These lubricants are formulated by OMC to give best engine performance while: Controlling piston and combusion chamber deposits Providing superior lubication Ensuring maximum spark plug life If Evinrude or Johnson Outboard Lubricant is not available, another NMMA certified TC-W3 oil may be usedLook for the certification information on the container labelRunning or storing an engine on leaner than recommended fueloil mixture may result in powerhead damageAvoid the use of the following as they could damage your engine andor shorten spark plug life: Automotive Premix fuel Premix fuel Premix fuel oils of unknown oil quantity richer than the recommended ratio leaner than the recommended ratio