I have seen that several i-clubbers (most with serious mods) run race gas when hitting the drag strip. I am planning to take my car to the track occasionally, and am concerned about the long term effects of using leaded race gas. I am fortunate enough to have 2 gas stations within 5 miles of my house where I can get Cam2 110 octane race gas straight from the pump. (Gotta love living in the middle of a racing community
.) My car is mostly stock, but I was thinking that if I were to mix the race gas about 50:50 with premium unleaded, this would give me a nice safety margin for cranking up the boost a bit with my MBC. My question is, have any of you who use leaded race gas had a problem with O2 sensors or cats? Do you run straight race gas, or a mix? Any info would be appreciated.