I just ran my first tank through with my new E3 Diamond Plugs, and i charted a 1.6 MPG increase over the NKGs i had before, I couldn't tell any noticeable difference it performance. I'm stoked so I thought should share the info.

 

im running e3s in my blazer and have to say that these plugs are well woth it in my opinion. ive had my e3 plugs for about 4months now. my mpg's went up about 1.2-1.6 in the hills of tenessee.