Here's what a good friend of mine uses for after run lube/fluid. [link=http://www.crcindustries.com/marine/content/prod_detail.aspx?PN=06068&S=N]engine store[/link] It comes with a spray tube just like wd 40 or other sprays and he's added a section of aluminum tubing over the tube that comes with the can so that it fits inside the fuel tubing on the engine vent connection. He just sprays it in after running for the day and the pressure from the can puts a good amount into the engine then he puts a screw or bolt into the vent line to keep the stuff in the engine case. It works slick. I have to go to a marine store to get some for my engines.