Some of those markups are insane. I can get NGK laser iridium plugs for less than $70.
Pros: cheap price, easy to find
Cons: insane markups
Vehicle:
Subaru
Owner reviews for spark plug
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At 85k I swapped to NGK Iridium Ix plugs on my 2019 civic with the 2.0na and I swear it added at least 20% response. Makes me wish I would have gotten it with a manual cause it would be so much more fun to drive around town. Also got a few more MPG
Pros: added response, more MPG
Vehicle:
Honda Civic
Mileage: 136794 km
I just replaced all 4 spark plugs on my car @ 114k miles. Now I’m so glad I did it because the car feels way more peppy and responsive.
Pros: car feels peppy, more responsive
Mileage: 183466 km
I got champion copper core for my 5.7 hemi which was what the factory had in it. I changed them at 68k and they probably could have gone another 68k they looked virtually new.Ran like a champ and I got them with rebates and at the end of the day they were 1.00 each.
Pros: Ran like a champ
Mileage: 68000 km
I have a N55, e93 And went through the same back and forth between NGK and Bosch. My car is 100% stock. Ordered ZR5TPP33 Spark Plug - Bosch and the car runs just fine.
Pros: car runs just fine
Vehicle:
BMW
Part number: ZR5TPP33
My F15 had the Bosch ZR5TPP33-S from the factory. I replaced with ZR5TPP33 when doing the valve cover about 20K miles ago, and no problems so far.
Pros: no problems so far
Vehicle:
BMW
Mileage: 20000 km
Part number: ZR5TPP33
I'm running NGK Iridium NGK LTR71X-II 1 step colder but I am tuned. Been running these sparkplugs since the car had 5000 km. I have 45000 km now in 8 years and a half and I have changed 3 sets as it is recommended to change them a bit sooner than 30000 km on a tuned car.
Cons: shorter lifespan on tuned car
Mileage: 45000 km
Part number: LTR71X-II
It\u2019s true that you dont\u2019 get quite as good performance as with the Bosch, but this is my second set of autolites and I\u2018m over 200k miles already.
Pros: high mileage, second set
Cons: not as good performance
Vehicle:
Volkswagen
Mileage: 321869 km
definitely not ok, they are spent, also Denso>NgK any day of the week
Pros: Denso better than NGK
Cons: they are spent
I had plugs from Amazon ngk and I had a wicked misfire couple days after. Somehow the ceramic broke off.
Cons: wicked misfire, ceramic broke
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