NGK are the OEM plugs. I have tried the Bosch 4 platinum. They are sitting in my tool box after 4000 miles. If you have see the thread on trouble starting I detail why I took them out. End result they do no better or worse than the OEM plugs. I can't speak for how long they last though. Probably not 100k; but, at Half the price 75k is a bargain.