I bought a NGK №6 4-pack for 20$ at local parts shop, After the replacement, engine problems began: loss of power, misfires, and severe vibration.
Cons: loss of power, misfires
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I replaced all spark plugs with Genuine Audi NGK plugs and replaced all Ignition Coils as well.
Vehicle:
Audi A6
I’m lucky if I get a full 5k miles out of a set of ER10S before one of them shits out and I get a misfire.
Pros: easy to change
Cons: misfire, short lifespan
Mileage: 8046 km
Part number: ER10S
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
NGKs are my go to’s
Pros: go to
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
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
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
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
At 85k I swapped to NGK Iridium Ix plugs on my 2019 civic with the 2.0na and I swear it added at least 20% response. Makes me wish I would have gotten it with a manual cause it would be so much more fun to drive around town. Also got a few more MPG
Pros: added response, more MPG
Vehicle:
Honda Civic
Mileage: 136794 km
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