Spark plug NGK or Denso

PartReview Score

Rank #1 in ranking

1506

597

763

4.0

Acceleration

3.7

Idle

3.5

Starting

4.1

Owners' choice:

PR Score

Ranking

Votes

Reviews

Average rating

Properties

Car

PartReview Score

Rank #2 in ranking

324

137

184

3.9

Acceleration

3.7

Idle

3.8

Starting

3.8

No data

Reviews

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NGK

Denso

Denso › Spark plug

Academic-Studio-3205 8 Dec 2025, 16:00

Acceleration:

Rating 5.0

I recently was having a misfire in cylinders 2/3, and new plugs and ignition coils cleared it up.

Pros: cleared up misfire

NGK › Spark plug

Ok-Session657 8 Dec 2025, 13:24

Idle:

Rating 5.0

After changing: Idles better and more consistent at 700~800 rpm range. Car drives smoother? Changing spark plugs made it visibly better.

Pros: idles better, drives smoother

Mileage: 215000 km

NGK › Spark plug

koonbob 7 Dec 2025, 18:33

Rating 5.0

NGKs are my go to’s

Pros: go to

NGK › Spark plug

MrFluffykens 7 Dec 2025, 07:03

Rating 5.0

I've run Denso and NGK on E85 for 10k+ miles and numerous track days, with zero issues.

Pros: zero issues

Vehicle: Volkswagen Golf

Mileage: 10000 km

NGK › Spark plug

Remy1738-1738 6 Dec 2025, 21:59

Rating 5.0

Holy shit - $75 spark plugs? I think my Honda plugs cost like $5 a pop for NGK iridium

Pros: cheap NGK iridium

Cons: expensive spark plugs

Vehicle: Honda

NGK › Spark plug

Kameni_Kare69 6 Dec 2025, 00:25

Rating 4.0

Also, you should probably go with NGK spark plugs because if you put Bosch ones that are made in China/Russia you are going to have a baaaad time

Pros: better performance

Cons: bad time

Vehicle: Opel Astra

NGK › Spark plug

Still_Eye_4596 4 Dec 2025, 18:09

Rating 5.0

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

NGK › Spark plug

No-Inspector-8515 13 Nov 2025, 00:31

Idle:
Acceleration:

Rating 3.0

They are 2 hot for the engine , (the orange burns ) try colder plugs like heat range 8 NGK (SILZKR8E8G97080) are heat range 8 . The ones you have are 92422 are heat range 6 they are 2 hot . Same plugs fit my 2013 Veloster turbo fit your car .

Pros: colder plugs

Cons: too hot for engine

Vehicle: Hyundai Veloster

Part number: SILZKR8E8G97080

NGK › Spark plug

Minimum_Pen2074 30 Nov 2025, 12:28

Idle:

Rating 2.0

I changed my plugs for NGK IRs but now I have a rough idle when the engine warms up.

Cons: rough idle when warm

Denso › Spark plug

ihit18today 22 Nov 2025, 14:35

Starting:

Rating 1.0

definitely not ok, they are spent, also Denso>NgK any day of the week

Pros: Denso better than NGK

Cons: they are spent

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