What would the colour of this spark plug suggest? Is it meant to be all black? : r/AskMechanics
Spark plugs in cylinder 1 is darker than others - MX-5 Miata Forum
Spark Plugs Black, Scooty and Wet, What Causes That ? - AutoExpose
Spark Plugs - Specialty | O'Reilly Auto Parts
What To Do If Your Spark Plugs Are Black And Wet - Drive Cave
Changed spark plugs by myself for the first time! Been learning more about maintaining my vehicle recently and it's made me appreciate my car so much more. 2013 Hyundai Veloster Turbo. :