No oil expert here, but I'm in the same conundrum. My boat was away having its trailer worked on and I kind of missed my winterization window other than draining the block/manifolds. After giving it some thought, I'm draining and refilling/changing the filter, and fogging. I'm sure it will be fine just this once. I know people who treat their boats much worse.
Previous: 1993 Prostar 205
Red 1998 Closed Bow Ski Boat, Ford 351, 310 hp, Acme 4 blade, Perfect Pass SG.
Tyler Ski Club
To me, this forum is about love of inboard boats. It is about the sharing of information and, on a good day, some humor. It is not about post count, brand of boat, or any other superfluous labels that lend themselves to a false sense of superiority. Please, respect one another, try to pass on accurate information, and keep your eye on the ball.