Bosch Spark Plugs - Copper vs. Platinum

[Jaxonalden]

dja1980,

Yes those plugs have four ground electrodes but the tip is not platinum or iridium. The big difference is wear! The copper will wear quicker and you will need to change them more often. The wear comes from the tip deteriorating and expanding the gap. A platinum plug will not wear as fast (50,000 miles) and will keep it's gap giving you a properly tuned motor longer. Yea you can say I want to pull the plugs to see how things are going but why replace plugs if you don't have to. Also, these engines are run by a sophificated computer, it will properly meter itself. There's nothing you could do anyway even if you did find something. It's not like you can mess with the timing or change the jetting like on an older car.

Hope this helps because you are obviously getting allot of information, now you just have to sift through it all.