i've had these in since i bought the car (they came with them newly installed) i've ran about 10,xxx miles on it and i suddenly had my car start running like crap... i thought it was bad gas or
fuel injector at first ... took it to autozone for a quick read and said misfire in cylinder 4... could be spark plugs, fuel injectors, fuel pump...... anyway turns out these $9999 spark plugs don't last ...