You may be interested in the discussions of zinc dithiosphosphate (ZDDP) in Aeroshell Sport Plus 4 in the Matronics web site under Rotax engines. Word is that Aeroshell is going to reformulate that oil to almost double the ZDDP because of wear concerns.
Also search ZDDP on google or whatever and consider what is going on with oils now.
FWIW
Also search ZDDP on google or whatever and consider what is going on with oils now.
FWIW