1988 Johnson Evinrude CC 60 thru 75 outboards Service Manual, Page 41Get this manual
Fuel and Lubricant Recommendations Lubricant Only the following lubricants should be used in the VRO oil tank, or for the recommended fueloil mixtures in fuel tank
Evinrude Outboard Lubricant Evinrude XP Outboard Lubricant Johnson Outboard Lubricant Johnson GT Outboard Lubricant OMC Cycle Motor Oil
They are formulated to give best engine performance with least combustion chamber deposits, least piston varnishmaximum spark plug life, maximum corrosion protection and best lubricationIf Evinrude or Johnson Outboard Lubricant or OMC 2-Cycle Motor Oil is not available, another NMMA certified TC-W lubricant (oil) may by usedLook for the certification information on the container label
INote mixture mayengine?npowerhead damagean leaner than recommended fueloil result
Avoid the use of the following as they could damage your engine and or shorten spark plug life: Automotive oils Premix fuel of unknown oil quantity Premix fuel richer than the recommended ratio Oil and gasoline leaner than the recommended ratio