Every now and then I like to respond to some frequently asked question. A common question asked is: What oil should be used with a two-stroke engine? In terms of an Evinrude engine, Evinrude XD100 oil, XD30, and XD50 are recommended for models made after 1993.
Another question that is frequently posed is: What is the proper fuel to oil ratio for my motor? Generally speaking, motors made before 1958 require 20:1, motors made between 1959 and 1963 use 24:1, and motors from 1964 to the present use 50:1. Racing boats require a 25:1 ratio, as do new engine break-ins.