vs
Spark plug OEM FORD or Denso
Spark plugs are only $15 for Denso iridium plugs (providing the longest life) and they take no more than 20 minutes to replace them.
Pros: longest life, easy to replace
Vehicle:
Toyota Corolla
Spark plugs are simple too, just need the proper sockets and swivels. Took me about 45 minutes. That middle plug on passenger side is the toughest, but twisting boot 180 degrees and pulling it out from the front made it a breeze!
Pros: simple, easy to install
Cons: middle plug toughest
If you doing the spark plugs do the coils too. For the spark plugs use Denso 3499 (about 15 dollars each), for the coils use Denso 673-1310, (about 50 dollars each).
Vehicle:
Toyota Matrix
Mileage: 239934 km
Part number: 3499
Tengo exactamente el mismo pero en azul, lindo bicho pero en invierno a la mañana sufris, mas te vale tener la bateria cargada y las bujias nuevas, porque sino no arranca
Pros: lindo bicho
Cons: en invierno sufris
Vehicle:
Ford Fiesta
Denso work quite well
Pros: work quite well
The plugs EQT recommends are compatible. I’ve been running Denso 5749 plugs for over 10k without issue
Pros: compatible, no issues
Mileage: 10000 km
Part number: 5749
i just put the densos in my '17 alltrack with a stage 1 tune and they run noticeably smoother than stock. i gapped them to 0.026" before install. it didn't seem like plugs would be that important for a stage 1 tune so i've been surprised.
Pros: runs noticeably smoother
Vehicle:
Volkswagen
Denso or ngk. Bosch at worst. I would recommend against the off brand in your photo.
Pros: Denso or NGK
Cons: Bosch at worst
Ive got the densos twin tips in a vxr at present. One thing i can tell you is they dont like heat!!! i recently had a small coolant leak and they would misfire. pretty low heat resitance i think. work fine on cooler engines.
Pros: work fine cooler engines
Cons: dont like heat, misfire
Had some Denso plugs in my '15 WRX (unaware to me) and the plug in cylinder 2 was fouled within 7k miles and caused a misfire. Turns out the shop that the previous owner took it to for the 60k-mile plug change decided to cheap out. I now have OEM plugs :D
Pros: now have OEM plugs
Cons: fouled within 7k miles
Vehicle:
Subaru
Mileage: 7000 km
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