Read the oil recommendations in your operator's guide.
If the synthetic oil is certified by the NMMA (https://www.nmma.org/certification/oil/tc-w3|) and carries the TC-W3 logo on the container, it is adequate for your Evinrude E-TEC G2 engine.
The following 2–stroke outboard oils are recommended for use in your Evinrude E-TEC G2 outboard:
•Evinrude XD100 Direct Injection Oil
•Evinrude XD50 2–Stroke Oil
•or a synthetic TC-W3 NMMA-certified oil
Evinrude XD100 oil is preferred for your Evinrude E-TEC G2 outboard. This synthetic formula oil provides uncompromised lubrication and superior performance, even in extreme conditions especially in cold temperatures down to 0°F (-17°C).
"There is never just one thing wrong with a boat";
-- Travis McGee, main character in a book series by John D. McDonald
The factory recommends that a properly trained technician service your Johnson or Evinrude outboard motor. Should you elect to perform repairs yourself, use caution, common sense, and observe safety procedures in the vicinity of flammable liquids, around moving parts, near high-temperature components, and working with electrical or ignition systems.
The information offered here is only general in nature and should not be construed as complete factory approved procedures, techniques, or specifications. Always use the proper service manual for your motor, up-to-date service literature, the correct tools, and have an understanding of how to proceed with troubleshooting and repair methods. If you are unsure or uncomfortable with a procedure, a situation, or a technique, enlist the services of a factory trained technician.