I had to swing by the boat dealer yesterday to pick up a bimini frame they were holding for me. This place sells primarily smaller craft (under 25'), and I'm not in there all that often. A big Mercury/Mercruiser dealer. But heading out to the yard I wandered past the service/parts desk. There, on a large shelf behind the desk was their lubricant rack. It was not Quicksilver . . . but to my surprise, Amsoil. All types, for engines, outdrives and two cycle. And not dusty or for show; this was their main rack and was seeing action. They likely have a bulk tank supply of something else (probably an HDEO) in the shop area. But still, this dealer seems to know about lubricants.