Spark Plug Change and Cylinder Head Images On High Mileage GS
05-05-22, 03:06 PM
#31
Exactly, they will easily run 100K miles without any issues. Changing them at 60K is wasteful and unnecessary. These engines will tell you when a plug is not firing as required. They will start dropping a spark once in a while before they get bad enough for the above average Joseph to notice.
https://www.densoproducts.com/how-lo...ium-plugs-last
”Denso Long Life Iridium Plugs have iridium center and a platinum ground electrodes. If installed in a regular engine, they would likely last longer than most people keep their car (barring any motor problems that can cause premature plug death). All Denso long life iridium spark plugs are an OEM design, made for a specific engine. Some feature a special resistor or electrode design, depending on the OE requirements. In their OE application, Denso's long life plugs can last up to 120,000 miles.”
On the more conservative side, the Denso spec for the OEM plugs on this engine says up to 100k miles. Which is much more than 60k. Makes no sense why Denso would over state the life, as that will hurt their sales and get into warranty claims and law suit issues.
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