1988 "CC" Colt / Junior thru 8 Models Service Manual, P/N 507659, Page 51Get this manual
Fuel and Lubricant Recommendations lubricant
Only the following lubricants should be used in the AccuMix TM oil reservoir or for the recommended fueloil mixtures in fuel tank: Evinrude Outboard Lubricant Evinrude XP Outboard Lubricant Johnson Outboard Lubricant Johnson GT Outboard Lubricant OMC 2-Cycle Motor Oil
They are formulated to give best engine performance with least combustion chamber deposits, least piston varnish, maximum spark plug life, maximum corrosion protection and best lubricationIf Evinrude or Johnson Outboard Lubricant or OMC -Cycle Motor Oilis not available; another NMMA certified TC-W lubricant (oil) may be usedLook for the certification information on the container label Running an engine on leaner than recommended fueloil mixture may result in powerhead damage Avoid the use of the following as they could damage your engine andor 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