Well I have seen these E3 spark plugs advertised and wondered if they would have any advantage in a 351W in a F250HD. I have heard they cause some vehicles to missfire. Do any of you have experience with them and would they give any advantage in my truck or should I just stick with the Motorcraft?

 

Stick with the Motorcraft, all the E3's will help with is lightening your wallet!!!

 

^^^ WHS, I used to work for well known engine builder, we tested some of these "gimmick" spark plugs and they had absolutely NO benefit.