vs
Spark plug Denso or OEM Mazda
I was running APR coils and went back to OEM. That helped. So did going to the Denso 5750 plug and getting an EQT grounding kit.
Pros: helped with misfires
Vehicle:
Volkswagen Golf
So I decided to I replaced my spark plugs. There was a ton of carbon build up in the first cylinder, and oil on the 2nd, 3rd and 4th spark cylinders, including the spark plugs. It’s running way smoother now but there is still some jerking but it’s not as violent as before.
Pros: running way smoother
Cons: still some jerking
Vehicle:
Mazda 2
The DENSO spark plugs are 6 for $23 at walmart. These get great fuel economy , smooth idle, Great Power.
Pros: great fuel economy
Have some I'm waiting to try out in my turbo 4age after using bkr7e ngks for years. I mean denso is an A1 company and they offer heat ranges colder than NGK so probably worthwhile for my turbo engine.
Pros: colder heat ranges
2019 4 gen - dealer sparkplugs were part number ZC20HPR11 > Denso spark plug.
I’m from EU, Scandinavia and that part number were on my original ones I pulled out.
Vehicle:
Mazda
Part number: ZC20HPR11
Plugs(Denso IK22) coils(DENSO or Hitachi) and a valve adjustment, all due at 100k. They really do make them run better and much more reliably.
Pros: run better, more reliably
Mileage: 100000 km
I installed Denso a few weeks ago.
Pros: installed recently
Densos. Buy them off rock auto.
Pros: none
Cons: gapping suggested
Vehicle:
Volkswagen Golf
I bought the plugs from Toyota (Denso). I asked for the old plugs off. The plugs I got back were NGKs that were installed at the factory. I can’t say I notice a difference really (except new plugs did seem to make a difference).
Pros: new plugs made difference
Cons: no noticeable difference
Vehicle:
Toyota
Part number: 9008091180
the densos work fine, the point of swapping is not for any performance gain, rather to prevent shattered ceramic from raining into your cylinders
Pros: work fine (normal use)
Cons: risk of ceramic shattering
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