NGKLKAR7AHX-S Spark Plug NGK Ruthenium HX Spark Plug

I'm about 500 miles into these on my 2012 Corolla (inline 4). Seem to work good, engine runs fine and gas mileage is roughly where it was. I don't track it closely enough to tell if there's a tiny increase, but it's certainly not worse. Reasonably priced, consistent gap on all plugs, and easy to install.

50K on the new plugs and they seem to work just fine

I recently decided it was time to replace the spark plugs in my 100k Mazda CX-3, and after some browsing on Amazon, I found a set that caught my eye. The price had increased by a dollar since December 2024, but I decided to go for it. After installing them, I immediately noticed a difference. The acceleration was much smoother, and there was a slight boost in power that I hadn’t experienced in a while. As for the fuel efficiency, I haven’t seen a significant improvement just yet, but I’m optimistic about that. Overall, I’m very impressed with the performance of these spark plugs and am really happy with my purchase. I highly recommend them to anyone looking to give their vehicle a little boost!

The plugs fit my 2015 Honda Accord LX and have been working well for several months. It seems like the idle is a little smoother with these plugs.

The way they cut the tip of the spark plug, you can see that it cut out isn't flat ideally, and it is kind of pointing up upwards(has excess) I am not sure if this will cause any problems later in the long run

I was skeptical on these, but since I have two Accords that use the same plugs I took out the NGK iridium plugs and replaced with these. The plugs I removed were only about 3 months old, so I put them in the other Accord and could test new plugs vs new plugs. My mpg did go up 0.5-1.0 mpg and it does seem to start a little quicker. I’ll buy again.

Beautiful work of art(technology). When it comes to spark plugs, NGK makes sipmle spark plugs into something beautiful to look at.Luckily, I received genuine NGK plugs from Amazon( no third party seller). They are all around 5k Ohms range, once again luckily.However, I do not recommend buying fragile spark plugs online because my plugs came in a white plastic bag with no protection whatsoever.5 stars for the plugs.-5 stars for delivery package.

Dropped these into a Mazda 3 with 60k miles and got an immediate response in starts, idling and acceleration. They will pay for themselves in 5 tankfuls of fuel.