Hi All. I am new to this forum. I have. a 1988 Mazda RX7 Convertible and in 32 years I NEVER heard of this OMP issue. My car has 130,000 miles on it. It runs great and I've never done anything major to it except puta new Air Flow Meter in (took me 3 tries to find one that worked). How concerned should I be about this? In the Sumer this is my every day car for nice days. Can I just replace it with a new one or should I start adding 2 stroke oil to my gas? How do I know when it's a problem?