vs
Spark plug Denso or Motorcraft
Reviews
Denso itv20 (5339) for stock/mostly stock. ITV22 (5340) step colder if more mods. I have only used itv22 since 2015.
Pros: good for stock
Cons: only for stock
Part number: 5339
I went with Denso's on my 1.8T because that is what I had on the shelf. but I have ran anything and everything in vehicles over the years, and found that there is not much different between the different types.
Pros: not much difference
Vehicle:
Volkswagen Jetta
As always, go with NGK or Denso plugs.
Pros: reliable spark plugs
My car was fitted with Denso Power when new, 11 years ago. It has done 63K Miles (101K Km, way more than the data sheets above say) and the economy continues to improve
Pros: economy continues to improve
Mileage: 101000 km
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
The DENSO spark plugs are 6 for $23 at walmart. These get great fuel economy , smooth idle, Great Power.
Pros: great fuel economy
Modern Ford engines tend to work best with Motorcraft or NGK spark plugs.
Pros: works best
Vehicle:
Ford
Bought some Denso 3450 Irdium plugs online. After reading about counterfits. I decided to test mine.
All are gapped .43 for the OEM spec for a 2014 Nissan Xterra. I measured the Irdium electrode tip which is 0.7mm and appears blue
Pros: gapped to OEM spec
Cons: potential counterfeit risk
Vehicle:
Nissan
Part number: 3450
I had EPC light/limp mode and P303 as well about a month ago on my '12 GLI (APR Stage 1+) at 102K miles that recently had a walnut blast and new Denso plugs at around 101K miles. Swapped coil packs as well and still P303 with EPC light/limp mode.
Cons: catastrophic failure
Vehicle:
Volkswagen
Mileage: 101000 km
Skip them, they are junk and a waste of money.
Get a good single platinum plug like the Denso 4511.
Pros: good platinum plug
Cons: junk, waste of money
Part number: 4511
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