Grrr. Now I'm not sure what to do. Just bought my 07 990 w 48k on it. I assume the issue was there prior. When i got it the overflow can for the radiator was empty and had grayish funk inside it. The motor runs strong and didn't buzz at all. I had the dealer do the first oil change and they didn't mention a wavy filter or anything weird w the oil. Maybe it just happened.
The oil wasn't frothy just a little more watery than normal. I'm going to put CJs kit in this weekend and give it a good flushing.
Now I'm worried about other potential issues w the motor and wonder if I should trade it in on a newer 990.
Dang. I just fell in love w her...