I don' have a copy of it but read a DDA service buletin 15 years ago that stated it fine to run 15-40 oil in the silver 92,s and other 2 stroke Detroits. I was building engines full time working for Nevada D.O.T. at the time and never saw any problems as a result of this practice. One of our bridge inspection trucks, an 86 IHC had this same engine and is still using 15-40 to this day and is extremely overworked. We used Kendal, and Delo 400 during this engines life.
Last edited by wanderinwillys; 02/27/2011 4:31 PM.
