40k spark plug change evaluation

You probably care about your catalyst and engine. Misfiring can destroy cats and pistons.

 

If I was misfiring I’d change the plugs. Just like my mechanic told me.

 

The Service adviser at my dealer had no idea the plugs needed changed at 40k.

 

The world is filled with ineptitude.

 

By then it's too late as misfiring can and will destroy catalytic converters.

 

Most of the Service Advisors have little to no mechanical Knowledge or aware of the baseline maintenance requirements. IMO of course