Same 1986 mercruiser 190 4cyl. What oil should I go with? I know I don't have to use Quicksilver but I figure I should use single weight (straight) 30 or 40. Also is there an easy way to figure out what oil filter crosses over to say Fram or similiar. I hadn't priced a "Merc." filter but I figure it must be more economical to get them at elsewhere. Also is there a kit to remote mount the oil filter? Its gonna be a pain in the butt to get at it, looks like if I remove the coolant overflow tank I can get my hand in to reach the filter.