Ditto on Hot Rod Lincolns reply. Ive been a auto tech for 40 years and customers have had me install all of the "gimmick plugs" and no one got back to me about how much better they run and how much better the fuel economy is. I proved it to myself with my 2000 Toyota Tundra, on two 800 mi. identical round trips to Portland. One with orginal plugs and one with the E-3 plugs as mentioned above. Less than .1 mile per gallon difference, always driven at the legal limit and with the cruise on. The only advantage is that you will not have to change plugs very often.

The older I get, I only want to work on older rigs.