Partner Sites: www. Club Sea Ray. Oil Recommendation for Mercruiser.
Engine manufacturers typically recommend an oil change every hours, and at least once a year. Even if your engine manual allows for a longer interval between oil changes, changing the oil more often will extend the life of the engine. One hundred engine hours between oil changes is fine for gasoline engines, but diesel engines are much harder on their lubrication.
Coming to this conclusion was easy because their engines simply outperform all others in terms of service life. But that's not all. Several years ago, I had the opportunity to tear down a Crusader engine and that of a competitor, side by side on the bench, and make a detailed comparison.
As you look at the engines on the market, you might notice that automobile motors are often cheaper than marine motors. So are they interchangeable? And if not, what is the difference between marine motors and automobile motors?