I saw this site and thought it was interesting. We've all seen so many innovations of spark plug design with so many claims for improved performance. Still we generally go back to the manufacturer's recommended plugs. I was reading popular science today and saw an ad for a new plug which got my attention. They claim improved fuel economy will pay back the increased cost of these plugs within one year (or less) and the plugs will have a 4-7 year life span.
http://www.pulstarplug.com/
http://www.pulstarplug.com/