My old AC Delco platinum spark plugs review.
Passenger & driver side spark plugs were AC Delco platinum's and were only 2 years old. I swapped them out for some Denso Platinum TT' ...
Autolite Spark Plug Evolution Anatomy of a Spark Plugs
Learn all about the history of spark plugs, the different metalurgy. Why there are copper, platinum, double platinum and iridium spark plugs
