Getting ready to winterize. What are the risks if I do not change the oil and filter? I do this at the end of each season. This one, however, the boat was on the water twice for a total of six hours. Normal use with skiers and tubers. I am fine changing the oil and filter if there is a benefit to the engine. On the other hand, if it's just a waste of time and money because of the low hours, I will skip. Appreciate any guidance. Thanks, guys. - Deerfield