vs
Spark plug OEM BMW or Denso
The tools aren’t expensive. Yes I use dielectric grease but not anti sieze on the threads (only because BMW orders us not to). Easy job for most cars.
Pros: tools aren't expensive, easy job
Cons: BMW orders not to use anti-seize
There is a noticeable improvement in performance when I cross over into the next country and refuel. This is what my denso iridium plugs look like after 20k km. I had a misfire. New plugs today, and the misfire is gone
Pros: noticeable performance improvement
Cons: misfire, poor fuel
Mileage: 20000 km
Denso or NGk for anything and everything preferably dual ground spark plugs. I would get them rockauto as they have the best price and you can get the OEM brand.
Pros: best price, OEM brand
Vehicle:
Toyota
Get the right dual electrode spark plugs, Denso or equivalent. They’re cheap, around $5 per plug.
Pros: cheap, around $5
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
Denso or ngk. Bosch at worst. I would recommend against the off brand in your photo.
Pros: Denso or NGK
Cons: Bosch at worst
BMW 116i. Over the course of a year,
New spark plugs
New ignition coil
New rocker cover
New water pump
New air filter
New cabin filter
New oil filter
New oil
New water pump tensioner and pulley
ECU flash
New battery
New wheel speed sensor
Cons: many parts needed replacement
Vehicle:
BMW
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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