Have a 07 Yamaha 225 HPDI and I always run RING FREE. It still runs good, but after looking at some of the comments here on the board about the different filters. Just how any are there and can I change all of them or does the dealer have to change some if the motor is under warranty. Want to try and make sure I don`t lean out and blow something. I guess I have about 150 hrs on it now, maybe a little more. And how often would it be advisable to change the water seperator filter that looks like an oil filter. I think Yamaha recommends changing some of the filters at like every 50 hrs, but that can get real expensive if you fish very much.