I have a 2005 Bayliner that is equiped with a Mercruiser 3.0. I was wondering what some of you long time boaters or experts use for oil and filters. I know what the manual recommends and don't want to start a debate on which is better. I just seems that there is always an alternative to the inflated OEM prices and sometimes you get better parts. At least that is what I have found in motorcycling.