I just installed the Denso Iridium Long-life Spark Plugs (SK20HR11) for my 2006 Toyota 4Runner and I was wondering when should they be replaced usually.
I just installed the Denso Iridium Long-life Spark Plugs (SK20HR11) for my 2006 Toyota 4Runner and I was wondering when should they be replaced usually.
I also use the Denso Iridium Long-life Spark Plugs. I changed the factories at 35K and put the Denso's in and at 95K I put a new set in for maintenance purposes only. The plugs shown no wear and I had no issues signalling me to change them. They have served me well. :hungry:
