Ahhhh, cool commercials---the true measure of a spark plug's performance LOL. Glad to see someone else also realizes that commercials set the standard of quality for any product.

That was a pretty good commercial, you may have sold me on ngk's lol.

For the record: this is sarcasm, and is not intended to offend anyone. Also, I run the 3923's... pretty happy with their performance, reduced some predet issues i was having (though that could have been due to my previous set being horrifically carboned up from neglect by the previous owner)

 

Been using champions since the 1950's in every thing I've owned. Chevys, Fords, Austin Healey, M G's, and Mopars. No complaints yet.

 

after the recent problems i have had with champion spark plugs i don't think i would use them again. i had about 6 or 7 bad champion spark plus in my engine and the fact my 81 had run with them in it was a miracle. currently i have 6 ngk's and 2 champion spark plugs in my engine in my 81. my 91 has all ngk. the only way to find what spark plugs work good is through trial and error and to hope you don't get a bad batch of spark plugs.