No particular reason to replace
Plugs were last replaced about 50,000 kilometres ago in 2019 at 175,136 kilometres
Lot of dust to clean up on the outside
The old NGK Ruthenium plug on the left, new NGK Iridium on the right.
I could easily do another 30,000 kilometres with these old ones!
I'll keep them as spares
Here's how I replaced spark plugs at 85,439 kilometres in 2013
