I went to colder plugs from ngk and noticed a difference in shift pattern for the better (my car is an auto).
Pros: improved shift pattern
Vehicle:
Volkswagen Passat
Reviews of NGK parts For Business
Average Rating
?
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
OEM plugs are NGK as well.
Pros: OEM quality
Vehicle:
Mazda
I changed my plugs recently and qent with NGK Ruthenium gaped a step colder and they are working well for me, seem better than Motorcraft but thats just my opinion.
Pros: working well, better than Motorcraft
I just did the 30k service and my mechanic recommended these plugs. They are expensive, but worth it.
Pros: worth the cost
Cons: expensive
Mileage: 48280 km
Learned 40 years ago to use NGK. Installed brand new Autolite plugs in my girlfriends Grand Prix and it ran like crap. Went to a speed shop and they sold me a set of NGK. Ran perfectly. Have only bought NGK or Denso since.
Pros: ran perfectly
Cons: ran like crap
I used these in my '19 with no issues.
Pros: no issues
Vehicle:
Toyota
Part number: 91657
spark plugs every 30K with NGK IKR9J8(Iridium plugs better than stock also used on high HP builds). I don't care that the manufacturer suggests longer intervals but i know my engine is healthy and runs almost like new.
Pros: better than stock, engine healthy, like new performance
Part number: IKR9J8
They run just fine on stock setup. Changed mine 6 months ago once the car was at 30k miles and actually managed to snap one of the plugs in the head ???? Carefully managed to get it out though. No noticeable difference from factory plugs.
Pros: run just fine
Cons: snapped during installation
Mileage: 30000 km
Additionally I would endorse the use of a Champion or NGK plug. The LG/Torch/random Chinese plugs are a crap shoot. I see tons of failures on them as well.
Cons: tons of failures
I just bought my son three coil on plug ignition coils with the NGK box but country of origin, China. I'm not happy with any Chinese crap.
Cons: Chinese origin, low quality
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