I have been following you on your recommendations in oils, etc.. I decided to go ahead an ask you. I've been a GC owner since July. Loving it! I bought a used SFR Canned Tune for GC 2.0T MT with the following specs: 93 octane, key entry, manual, o2 off, no launch control. I still am running with the both Cats in the car. Will this cause any issues(short/long term) running with the cats while tune have o2 sensors off? Already sent Jay a pvt msg, but been waiting like month for a response from him.