Bosch Platinum plugs

After working in the auto repair industry for 14 years, I'd agree with the folks who said they are junk. They ARE JUNK. I wouldn't put one in my lawnmower.

I once pulled 6 of them out of a 4.0L Jeep that had a misfire. Five of the plugs had ALL four of the ground straps completely missing!! Some had the porcelain missing completely. Where they went, and how the vehicle even ran, I'll never know. Probably some went out the exhaust, and I'm sure some are embedded into the piston tops! Put the correct plug in the vehicle ($1.39 Champion), and it ran fine.

Had a hyundai one time with a single cylinder misfire, pulled the plug on that cyl. (bosch platinum) and there was nothing left of it. The complaint from the customer was "Check for rod knock". Put 4 of the correct spark plugs in the vehicle (NGK), and it ran better than ever. Customer thought they were going to be paying for an engine overhaul with as bad as it ran/sounded.

Somewhat off topic, since this post is related to our older mopars, but on newer cars ('96-up), you must use the same brand of plug that came out of the vehicle. Otherwise, you'll more than likely get to know the fault code P0300 (multiple cylinder misfire) very well ...