Spark plugs do actually vary for some reason, I always use whats oem to the car. In my case thats the ngk iridium plugs (same goes for cables).
Vehicle:
Subaru Impreza
Reviews of NGK parts For Business
Average Rating
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The manufacturer's average rating is calculated based on ratings of all its spare parts. It determines the place in the manufacturer ranking
3.8
Manufacturer Ranking
#103
790
Spare Parts
2
Country
Japan
Website
ngk.de
Spare Parts
Comparisons
NGK or bust.
Most manufacturers don't make their own spark plugs anyway. They are usually just rebranded Denso/NGK/Bosch. I would have no concern fitting NGK spark plugs provided the part number is correct.
Pros: no concern fitting
Use NGK brand and replace it.
Pros: easy to replace
There is a meteor 350 in my riding group with an iridium plug which i will say he Acquired Unexpectedly, and damn the results are just awesome.
Pros: results are awesome
Mine had NGK, so that is what I put back in.
I have been using the ngk ruthenium sparkplugs and they work just fine, cheaper than the iridium's.
Pros: work just fine, cheaper
When that started I replaced the spark plugs and coil packs. This was done at 82k miles. There were very small amounts of oil in cylinders 1, 2, and 4. Problems still persisted after replacement of plugs and coils.
Cons: problems still persisted
Vehicle:
Volkswagen Golf
Mileage: 131951 km
Put in new plugs which are NGK 2309 at stock gap which was recommended by my tuner. DID NOT CHANGE OR FIX MY PROBLEM.
Cons: did not fix problem
Vehicle:
Subaru
Part number: 2309
Those spark plugs don't look like the highest quality parts. Get some from NGK or Bosch. Better made parts that are more suited to modern engines
Pros: better made parts
Cons: not highest quality
Vehicle:
Subaru Impreza
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