Friend of mines dad recently passed and she inherited his boat with a 2014 60 Merc 4 stroke. Besides changing the cover because it has damage from Hurricane Ida, Im going to pump out the old fuel and service the engine. Those of you with the newer Merc 4 strokes, which oil are you running? It calls for 10W30 or 25W40, Im assuming Yamalube 20W40 or either Quicksilver 25W40 will suffice. Although Im not a fan of Lucas oils, Lucas 25W40 Marine is available at Wal Mart and its FC-W rated so it should be fine. I like to stick to FC-W rated oils in outboards. Ill change the plugs, both fuel filters and the lower unit oil. Should I use an 80W90 or SAE 90? Thanks guys.