I have a Mercruiser 5.7 with 450 hours built in 1988. I'm about to lay it
up for the season (northeast). Does anyone have a suggestion for engine
oil? I'm inclined to use 10W30 Dino oil which is what I use in my car. The
boat is new to me so I don't have a "what did you use last year" to go by.
Any ideas would be appreciated? Thanks, David