Avoid the NGK’s Bosch or “Volvo” (also Bosch) plugs are way better than the NGK’s.
Pros: better than NGK
Cons: NGK not recommended
Vehicle:
Volvo
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I also went with the IKBH20TTs. I noticed my mpg was better after doing so, and the truck seemed to idle and drive smoother.
Pros: better mpg, smoother idle
Mileage: 95000 km
Part number: IKBH20TT
I ended up going with the Denso IKBH20TT because I couldn’t find any FK20HBR8 at a reasonable price and availability.
Part number: IKBH20TT
The car started to misfire at boost so I swapped plugs to NGK PFR6H-10 and everything is good now.
Don't use Bosch sparksticks.
Pros: everything is good now
Cons: car started to misfire
Vehicle:
Saab
Part number: PFR6H-10
I use iridium’s NGK haven’t had any issues.
Pros: no issues
I used champion spark plugs.. no problems here
Pros: no problems
Use the AC Delco iridium original plugs. Many sites will only show the double platinum as a replacement but every time I've ever driven an engine with those in it, it pinged or idled rough and iridiums always fixed it.
Pros: iridiums always fixed it
Cons: pinged or idled rough
I replaced the spark plug with an Auto Lite spark plug. Engine light went away but still runs rough and misfire on acceleration.
Pros: Engine light went away
Cons: runs rough, misfire
I purchased some Autolite XP Iridium spark plugs earlier this month and immediately installed them. Within a mile of driving, the car started shaking violently and the check engine light came on. I immediately turned around and reinstalled the old plugs and the problems went away.
Cons: car started shaking violently
I replaced mine with Bosch once, it drove like shit and I immediately replaced them with NGK.
Cons: drove like shit
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