Hey, I am building a 4.3 to go back in my boat, my experience is in building automotive engines, and I have my preferred oil brand a weight I use for that. Well with this being a marine engine, and a freshly rebuilt one, what do people usually run, straight weight or multi. Additionally, I live in Key West so its almost always hot. I am thinking of straight 30 or 10w40, kind of a toss up and I am looking for advice.
