NGK (2477) ZFR5FIX-11 Iridium IX Spark Plug, Pack of 1

I changed out my old NGK plain-jane plugs with these, and I'm very impressed. My car runs extremely smoothly now, and it seems like it has more pick up. The only thing you have to know about these are that you must gap them, and you can't use a traditional gap tool since you might break the electrode. You need to use a fancy gap tool, or get creative and use something else to bend the metal away from the electrode without touching it. I did the latter, and managed not to break the electrodes. NGK's website has all the correct gaps for your make and model. Go there and find yours. Also, watch the NGK gapping video on Youtube. It's worth it.

I was using Autolite AP5224 and they did work very nice; the issue was 3 years of intensive driving simply destroyed my old sparks. As a result difficult starting during mornings and incorrect funtioning until engine got hot and "check engine" light was blinking continuously. All that mess was solved once I changed to these NGK ZFR5FIX-11; buddy, you must try them to believe the results. Engine starts quickly, works smooth as silk, higher performance and lower gas consumption.

What a load of crap. I just installed it in my 2000 civic and I did not see any REAL noticeable benefit.
After all the hype about increased mileage, increased fuel economy, quicker starts, etc, etc. I have yet
to clearly perceive any real benefits from using it. I paid a arm and leg for it and cannot realize its
benefits. For civic owners you can continue using the regular NGK plugs, just change them every 8 months
and you are good to go. I will not waste any more money on snake-oil plugs like this. I will revert to using
the regular plugs after I have exhausted using the iridiums (since I already bought them, might as well use them).