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I ve been through 3 02 sensors in one year from 96k to 130k my warranty replaces them for free but that runs out at 150 also has had 3 cats since then wtf is going on ?
no seafoam but i do use 87 octane gas when i bought the car at 96k it already had one cat replaced back then now at 127 ive done a cat and 2 o2 sensors