Has anyone had the Speed-Pro O2 sensor go bad from running race gas? The guy I bought the car from says he never ran anything higher than 100 unleaded for fear of ruining the O2. A friend of mine uses some of my Monte Carlo's 114 in his car while at the track and has a heated O2 with the factory ECM and is constantly going through O2 sensors. I just wondered what you guys have found as I don't really personally know anyone else running the Speed-Pro system. Thanks Jason