So I have battled with my twin F200 "making oil" since day one of purchasing them new. After trying all kinds of things to remedy that I think I finally have it broken in enough and not getting anymore blow by fuel in the oil. However over the course of having this issue and high oil levels, the port engine developed an oil leak that only leaks after long offshore runs at high rpm. Dealer can't find leak or reproduce it, Yamaha doesn't seem to have much advice or help under warranty. I'm just wondering if anyone else has had this issue and fixed it? These engines were brand new and only have 180 hours on them. You can see the oil in the attached photo on the port engine cavitation plate. It's leaking and running inside cowling and onto the plate.