06 Sienna at 230k miles with original Iridium spark plug.
It is recommended for replacement at 120k miles in the manual. I did not change it for two reasons: 1. there is no signaficant drop in gas efficiency. 2. It is time consuming for replacing spark plugs in 06 Sienna (the back three spark plugs). I did open one of the cyclinder, the spark plug looked normal at 160k miles or so.
8.5万迈更换的火花塞
看不出剩个啥gap, 那可是最关键的。
差不多十万时misfired. 有一个的中心极烧掉了1/3. 不得不换掉。
It is recommended for replacement at 120k miles in the manual. I did not change it for two reasons: 1. there is no signaficant drop in gas efficiency. 2. It is time consuming for replacing spark plugs in 06 Sienna (the back three spark plugs). I did open one of the cyclinder, the spark plug looked normal at 160k miles or so.
对应的火花塞GAP因烧机油OFF，烧蚀严重
虽然没算过几次。
手册建议8万迈换火花塞，gas mileage 没有任何变化。还是决定8.5万换掉。两个消掉上顶的并不是磨损掉了，而是特别设计，看图片，型号不同（大型号一样，小号不同，一个是11，一个是8）。为什么四个火花塞两两不同？
所以我回楼主时就说了两极间的gap才是关键。
头一次换火花塞