How do you like your 4-stroke Susuki? How long have you had it? Is it under warranty. As you can see in my post that we just bought a set of Suzuki's. I'm a Yamaha fanatic but we couldn't pass up the deal we found and I know nothing about them. I was talking to the Suzuki dealer and he said the same thing that Yamaha says about their motors. If it is under warranty USE SUZUKI brand oil and filters. It avoids a lot of headaches if you have issues later on down the road. It only cost $4 more to use Yamalube in my Yamaha's and they never question anything concerning warranty's.