| Since Im aware of the danger of wrecking o2 sensors with leaded fuel, Ive never used it at the track. However, my friend who Im staying with next week in AZ has 4 gallons of leaded 104 octane. It would save me some money if I just used that and didnt buy any race gas at the track. Would ~4 gallons of leaded fuel cause any noticeable damage to the o2 sensor. Woudl it take a significant amount of life from the sensor? Thanks in advance Josh
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