I must have terrible search skills because i spent the last 2 hours looking for a thread that asks the opinion of everyone on what o2 sensor to run with race gas. i within the last few weeks, read about it, but today i wasted a heated o2 sensor in the car i just bought and now need to go buy one tomorrow to compliment the used MAF sensor that i bought to replace my bad one. so can anyone tell me what the best O2 sensor for our cars is? Thanks for your help!