I think the e-3's will have the same effect as putting bosch platinum plugs in. I have so many people come into the shop after they did their "own tune up" and someone at the auto parts store pushed the bosch plugs on them and they cant figure out why their car runs worse. You pull the bosch plugs out and put the stockers in and it runs fine. Ill stick to my stock plugs. If the e-3's did perform better it would probably be in a very high powered vehicle with an extremely hot ignition or the difference would be so insignificant that you wouldnt even be able to feel the difference. Thats just my opinion im very sceptical of spending 4 times as much for spark plugs that may or may not work. I would rather buy the stock plugs and spend the money i saved not buying the expensive plugs on a 12 pack to drink while i do my tune up.