I been throughout spark plugs, and trust when I say that they dont make a difference. Platinum's only last slightly longer than a copper plug, the best way to go is with a good stock plug, AC Delco, NGK, Champian, are all the same. And just a quick pointer for all of you NOS guys, Dont ever run a platinum plug with NOS, it causes severe detination. I guess it's ok if you have a thick wallet. But for example, Top Fuel Dragsters with 7000 hp use regular copper Champian plugs. The main reason I dont suggest Platinum is because they burn so much hotter, the combustion chamber in your engine is already extremely hot, more heat will only make it run worse, or even worse, damage it.