1999 "EE" 90, 115 FFI, 150, 175 V4, V6 FFI Outboards Service Manual, P/N 787024, Page 30Get this manual
Engine 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 combustion chamber deposits Providing superior lubrication Ensuring maximum spark plug life
If Evinrude or Johnson Outboard Lubricant is not available, another NMMA certified TC-W oil may be usedLook for the certification information on the container label