I run NGK iridiums in my vehicles due to them being turbo/supercharged.
Pros: good for turbo/supercharged
Owner reviews for spark plug
Manufacturers
Comparisons
Stick with NGK for plugs, its the OE manufacturer, Bosch or Denso are good second choices. Never touch autolight or champion
Pros: NGK is OE manufacturer
Cons: avoid autolight, champion
Change spark plug to ngk iridium.
Pros: iridium spark plug
they certainly look to be different heat ranges. do yourself a favor and stop going to the dealer for spark plugs. the only different between the dealer spark plug and a big box store spark plug is that one does not come with the VW logo stamped on the side of it. they are otherwise the exact same plug. just go get yourself some new NGK's (all 4) and put yourself at ease.
Pros: exact same plug
Vehicle:
Volkswagen
At least with double iridium ACDELCO on the c5. It’s 100k intervals.
Pros: 100k intervals
Cons: PITA to do them
Vehicle:
Chevrolet Corvette C5
Mileage: 100000 km
Fomoco plugs are actually pretty good. I replaced my Ford Escape with some more expensive Bosch and had misfires immediately. Got some Fomoco’s from O’Reilly and haven’t had an issue since.
Pros: pretty good
Cons: misfires immediately
Vehicle:
Ford Escape
I used NGK plugs in mine. A bit expensive, but they work great and I get 6 litres/100km for fuel mileage.
Pros: work great, good mileage
Cons: a bit expensive
Bought a 03 100 series with 241,000 only issue was the number 7 spark plug blew out, had to re-tap it and install a aluminum sleeve, and replace the coil
Pros: basic repairs upgrading
Cons: spark plug blew out
Vehicle:
Toyota Land Cruiser
Mileage: 241000 km
I bought Autolite spark plugs but after researching I should of bought NGK. Right after replacing them when I accelerate my car jerks or misfires when driving. When at an idle I felt my car jerking.
Cons: car jerks or misfires
Vehicle:
Nissan Altima
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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