NGK (6240) PLFR5A-11 Laser Platinum Spark Plug, Pack of 1

This is a very good price for these plugs. It is also a plus that you can get free shipping with them. The only downside is they limit the amount you can purchase to 5 plugs. I'm not sure if they did their research on this item. It is the required plug in many Nissan/Infiniti engines that require 6 plugs. I found this somewhat annoying. I will have to go buy another plug from Auto Zone or something now. Maybe they should look into this and allow people to purchase 6 instead of 5.

Put them in my 2004 G35 sedan at 72K miles (6 years). OEM for my car.

Couldn't tell a difference frankly, but I did it preventatively and I am glad I did it. The old ones definitely showed some wear when they came out, but no oil contamination thank goodness.

Relatively simple process. They come pre-gapped.

I bought a set of Pulsar Iridium spark plugs to replace the existing set of NGK spark plugs in my Infinity.
The NGK Platinum plugs had about 100k miles on them and the engine performance seemed to be dropping slightly.
After installing Pulsar Iridium Plugs the car didn't run right. The engine misfired and ran uneven.

I pulled them out and bought a set of NGK (6240) PLFR5A-11 Laser Platinum Spark plugs which were the same as the original equipment on my car. These NGK plugs worked splendid. My car's performance was restored to like new.

I recommend these spark plugs.