... price The new environmental protection and energy saving spark plug adopt the bran-new design, the center electrode ... The trait is more use life than ecumenical spark plug, more spark, better firepower, so the mix oil-air ... one who gain the annular multipolar energy saving spark plug in the country and the way of ... (NO. X12001(2007), compare to the ecumenical spark plug, it can save oil about 10% in the ...