I'm new to the Jetski world, just purchasing a '03 Ultra 150 yesterday. Took it out for a test spin and seems to be working great. Any tips for a newbie to PWC? I've been looking at oil and was wondering if switching to a synthetic is a good way to go(after whats in there is gone). Its only got 60 hours on it. Any other care or usage tips? Any help would be greatly appreciated!