The point is that dielectric grease is for the rubber boot on the ceramic plug insulator, NOT for the contacts. Yes, it is probably squeezed out of the metal-to-metal contact so does no harm, but it isn't intended for the contacts.
Use a conductive anti-sieze paste on the spark plug threads, cuz this part of the circuit.
For low temp contacts, a conductive and oxide-cleaning product like Ox-gard works very well. (available in your local hardware store.)
Use a conductive anti-sieze paste on the spark plug threads, cuz this part of the circuit.
For low temp contacts, a conductive and oxide-cleaning product like Ox-gard works very well. (available in your local hardware store.)