Quote Originally Posted by know1 View Post
First of all, thank you so much for the many replies from everyone. I really appreciate it.

I'm going to look ignorant here - mostly because I am ignorant about this - but the motor is a 1998 Evinrude Intruder 150HP. On the serial plate, it says to use TC-W3.

So I guess that was the information I should have posted originally.
About all the oil on the market to day is TCW-3. TCW-3 stands for(Two cycle water cooled) TCW3 oils have more anti-carbon additives than the older oil TCW2 that it replaced. I would not buy the cheep oil it may come back and bite you.