NGK Iridium Spark Plugs at 100,000 Miles

NGK (6994) Laser Iridium Spark Plug
Designed to operate over a much wider heat range than ordinary plugs
Resists carbon buildup and pre-ignition
High alumina ceramics for better heat transfer and electrical insulation
Solid copper core and nickel tipped electrode provide a longer plus life
Patented triple gasket sealing process eliminates the possibility of combustion gas leakage
Laser welded Iridium center electrode tip ensures high durability and greater spark
Platinum disc welded to backside of ground electrode provides long life
Longer insulator nose prevents fouling, Corrugated ribs on insulator prevents flashover, and the triple gasket seal eliminates combustion gas leakage
Faster starts and quicker acceleration
Better fuel economy and lower emissions, Trivalent Metal Plating for superior anti-corrosion and anti-seizing

[CowenJE]

if you take the old plugs out and they look like new ones PUT THEM BACK IN. Idiot, don't replace shit that still works.

[Crawfish]

I replaced my NGK at 215K miles. That's right!!! Never replaced them until 215K miles and they were still working fine !

[Ratlins]

Thanks for making this video and showing a close up view. Now I’m sure I don’t have to replace my plugs with 79, 000 miles.

[VIDSTORAGE]

Aye, I just pulled mine at 113, 000 on a Nissan Rouge and they were lightly worn. ..These have the ground electrode fine tips that you cannot put pressure on when setting the gap..I can feel a far better engine response at a low speed with the new ones.

[plumkey]

My two cents worth: If iridium plugs came OE on the vehicle, then it is a near-certainty that the plugs were put through the rigorous paces of real-world uses, and the results of the testing goes into the recommendations for the mileage/frequency of spark plug replacement. The center and ground electrodes may be fine, with little to no wear, but it is the rest of the internal structure that will begin to fail - the internal resistance will gradually increase over time, esp. with such high voltages. Some plugs may not malfunction, but some will eventually start misfiring. With a price of $9-$12 each, it is well worth it to follow the intervals recommended by the manufacturer. I personally think their oil/transmission/differential intervals are not as often as they need to be, so I just look at the situation as having flexibility. The cost of a new catalytic converter vs the cost of a set of plugs makes this a no-brainer. Squeezing the last ounce of life out of a set of plugs is just not worth the potential damage to O2 sensors and the cat, since a misfiring engine has been proven to affect these expensive components and result in premature failure.

[DARisse-jiyw]

Just changed mine (same plugs) at 106000 miles in mt Suzuki SX4. The old plugs look good, and I'm cleaning & keeping for spares. As an old guy, I think over 100k miles without cleaning or gapping is more than one can ask of a spark plug... though it looks as if I'm wrong. The higher price is worthwhile in the long run.

[briangray]

I see sellers stating 40-50k miles usage, but I'm pretty sure they are designed for 100k. Likely they are trying to make up for loss of sales due to plug longevity.

[JayJay-iiun]

I just did mine. Toyota sienna 104000. Looked like new.. very hard job. I would have left them in till 190000 if I knew what I was getting into.

[dannymartinez]

I just replaced mine at 240, 000 original miles. They still looked good!

[kermitlily]

just because they "look good" doesnt mean they are ok. the ceramic wears out due to heat cycling and can crack prematurely. i woul definetlt change them regardless if they look good.

[nicselectronics]

Just settled on some NGK iridium IX plugs, great performance gonna run em indefinitely

[maverick]

White letter paper with them on top will avoid watchers headaches trying to see the tip.

:)

[andisadler]

I use these Iridium plugs. they are so good they kill coil packs reguarly.

[ВладиславКомаров-ыр]

Пацаны , красавчики, я торчу от ваших комментариев, инженерная сила в вас, мужчины так держать !

[raycat]

The iridium plugs on my kids car were so worn that the center electrode was worn to a tiny pencil point and part of the electrodes had welded themselves to the ground electrode. I suspect the plugs were never changed at 160, 000 mi

[mathewkromeo]

Nice video, thanks. I just bought a set for my van.

[jayreese]

Nice video. I really appreciate the lack of opinion and just a visual so you can arrive at your own. I think I'll give these plugs a try since replacing the plugs in my 2006 Chrysler 300 is a time consuming venture. Thanks again.

[richardwilliams]

I had similar observation when I changed my RSX Type S plugs at 110, 000 miles. The brown discoloration on the ceramic might be another aspect of spark plug wear.

[BusinessEtiquettes]

Next time do a resistance test. Then compare resistance from new to old.

[SuperTundra]

100k is a common change interval for iridium plugs. Its good to look at the plugs as they are an indicator as to how the engine is running and they can point to issues suck as oil leaks or rich or lean conditions. Take car of your car and it will reward you many many miles ... trouble free