ebay 賣低於10刀。不過值了，看看下麵的說明：

Has the highest Platinum content in the industry, creating an extremely long life spark plug

Stainless steel washer reduces plug self-backing

Has Laser welded Platinum tip on center electrode and Platinum tip on the ground electrode

Reduces the voltage needed to start combustion, resulting in better throttle response, improved efficiency, and smoother idle

Offers a Laser welded projected Platinum tip on center electrode and the ground electrode

Special design firing end construction

 

快成純白金的了：）隻要不燒機油，大概以後再不用換了。