I'm getting the boat ready for river season and have a couple of questions about oil. Are boat oil filters different from an automotive oil filter? I plan on changing my boat oil and was wondering if I could use a automotive oil filter instead of the marine power oil filter. The engine is a stock 350HP Marine Power 4800 used on a jetboat.
Also, I have been using Synthetic Royal Purple 5w-30w oil. I really like it and will continue to use this bran. Do I need to add an oil additivie such as Lucas, Slick 50 or Zinc to the oil for better over all performance. Or is this overkill on a stock engine?