Anyone on here running E3 spark plugs? What do you think?

 

Have read a lot of threads saying they don't work well. I pit motorcraft in my truck.

 

I couldn't find too much on them, what were the problems with them?

 

I use them, they work great. They're fragile, installation is key.
I've got 10,000 km with no problems

 

Did you notice a drop in gas mileage?

 

Nope! My mileage increased, but I can't say it was from the e3s. I had 160,000km on my factory plugs when I pulled them, so there was pretty much no way it could have gotten worse.
This is the first time I've seen success with non motorcraft plugs in a ford.... So far so good!