Re: General oil question
Welcome to iboats.<br /><br />If it's still under warranty, it's best to use their stuff. It's not required as long as you follow the recommendations, but sometimes it avoids warranty problems.<br /><br />Marine 4-stroke oil is made to be run in a marine environment in a motor that's running redline for hours at a time. They're working on standards as we write. Right now I'm not sure how different they are than car oil.<br /><br />Gearcases use hypoid oil. Some older Volvo Pentas use 10W-30 in their drives, and electric shift models use a thinnish oil with certain additives. Pretty much everything else uses some kind of hypoid oil. Marine gearlubes contain additives to hold water that leaks in in suspension. There are petroleum and synthetic based gearlubes.
