Postby volvite » Sun Aug 28, 2011 8:16 pm
I've never tried E3 plugs myself, however I'm been a member of my Jeep forum for some time now, and coming from other reviews, I have not heard anything real positive out of them. On rare occasions, I've heard they have broken and left parts in the cylinders. Again, no personal expierence but just posts from other reviews.
I have used NGK plugs in vehicles and have had great performace out of them. When the time comes, I'll be using NGKs.