Performance plugs like NGK, Bosch, or Autolite?

 

I am running E3's and have had no problems as of yet. I didn't see any change in performance or fuel efficiency. I pulled one the other day just to check how they were fairing and they still looked really good. Like others have said, don't expect anything more out of them. I will probably just go back to champions next go around.

 

I ran e3s in my hemi and it would eat them up. Chased it for 2 years before giving up and going back to regular ngks. I had 8 plugs blow the grounds off using e3s. That said my lawn mower doubled it's mileage with e3s and my mom's mustang picked up just over 3 mpg using them. I will never use them again

 

I like the NGKs. I only use the Laser Double Platinum (4998) PLZTR5A-13 in my 2010 (3.8L) JKUS.

The fact that NGK's Mooresville, NC plant that makes 95% of the ceramic catalytic converter inserts used in the USA is a customer of mine has no bearing on my choice... other than I know first hand how meticulous they are about design, material and quality control.

Your local auto parts store probably has them in stock.
Advance Auto Parts: Search Results for ngk 4998

 

I think I might have to take back what I said about not having issues with the E3s. Since around Christmas I started with a slight rough idle that almost felt like a very slight misfire intermittently. I had been unable to figure it out, but some of what yall said about E3s made me wonder if it was a plug going bad. So I picked up a set of Champion original equipment today and installed them. I'm not feeling the misfire sensation now. I'm going to need to run a little longer to be sure, but I'm hopeful.

 

You are having the same problem I had with the e3 plugs, threw a misfire code after only 10K miles, replaced them and no more problems for about 40K miles. This past weekend replaced the Champions with Bosh and I can feel a difference (not sure if it's the type of plug, or just a newer plug), but idles better and pickup is somewhat smoother.

 

Recommend OEM plugs here. First set changed at 95K miles because I was installing a dual-battery tray and didn't want to have to pull all of that out just to change plugs. No problem pulling out plugs, no problem with misses or pinging, no problem with removing them. Here's what they looked like:





Bear in mind that the engineers who designed your Jeep and speced the spark plug gap are fully aware that it will widen. That is why they specify the gap they do. If a widening gap was a problem then we'd have to do like what we did when I was a kid: Pull the plugs out every few thousand miles and reset the gap. Don't imagine problems that aren't there: If you have pinging than more than likely you have a different problem with your Jeep or the gas you're buying (my experience and that of my friends with whom I travel all over the country with is to always buy 87 or 88 octane. Always, even at higher elevations).

I replaced those plugs with NGKs. They were a lot more expensive, and I netted zero improvement in gas mileage, performance, anything. They were not worth the money. Because I was having a problem with an intermittent miss in my Jeep I replaced those at about another 75K miles. They were easy to remove (copper antiseize is your friend), one did seem a bit more worn down than the rest, but still had plenty of life in it. Here is what they looked like ...



Remember that admonition I wrote above about having a different problem? Yeah, head gasket. That means this all over again ...