Review on Champion RER8MC 445 Copper Spark by George Bridgewater

I recently bought a used 2011 Kia Soul with a 1.6 liter engine and 160,000 miles from the original owner. The car ran great and averaged around 28mpg. Last week the check engine light came on and the OBD scanner showed code P0304 - cylinder 4 misfire. I pulled out the spark plug and to my surprise it was a genuine RER8MC Champion spark plug. The copper electrode is completely worn out. I contacted the owner and he confirmed that the spark plugs were never changed. My Kia Soul drove 160,000 miles with these spark plugs before they failed!