Help with spark plug choice: Bosch Platinum 4 or Denso Irridium?
I currently have Bosch spark plugs installed with 4 electrodes on my Honda CIvic 01. They are relatively new, I only drove about 35 000 miles since I put them one. It gives me pretty good mpg, with nice smooth idling. But I am thinking to change them
Don't use the Plat 4's your engine doesn't make that kind of horsepower that there designed for. Platinum 2 would work just fine. Those are still a waste of money. Like the other guy said just get some NGK's they do they job and there pretty cheap compare






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The left Bosch Super 4 spark plug has done 10 000km on leaded petrol. The right Bosch Super 4 spark plug was removed recently on my last servive and was used with enleaded petrol.