Fresh AC Delco copper core plugs are all you need. Start with the stock replacements and go from there.
Pros: fresh plugs are all
Owner reviews for spark plug
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That said, make sure they use quality parts. BMW/Bosch spark plugs and OEM pulleys (and belt) are a must. NGK plugs are cheaper and don\u2019t last as long. Same goes for off-brand belts and pulleys.
Pros: quality parts are a must
Cons: NGK plugs don't last
New plugs and a fuel filter are all cheap and easy maintenance items that no ones done.
Pros: cheap and easy
Vehicle:
Ford Crown Victoria
I just swapped out an original set from 2006 that had exactly 165,050 on them. Car still ran great before the swap.
Pros: car ran great
Went with Bosh double platinum plugs at 60,000km when I notice a stumble at idle and that's the interval for change. I instantly went from best of 9.6L/100km to 7.8L/100km big difference in performance and smoothness and i prefer a German plug in a German car with Bosch electronics.
Pros: improved fuel economy, increased smoothness, fixed idle stumble
Vehicle:
Volkswagen
Mileage: 60000 km
Spark plugs I put in it 15k miles ago were NGK 7968 Laser Platinum
I'm guessing they have been in there for 175k? NGK for the win.
Pros: NGK for the win
Vehicle:
Nissan Maxima
Mileage: 175000 km
I just completed my first spark plug change on my G20 330 at 40k miles. Three of them especially Cylinder 1 came out "wet" and I'm unsure if it's oil.
Cons: wet spark plugs
Vehicle:
BMW
Mileage: 64373 km
Those empi ones are trash
Cons: empi ones are trash
I just came across a recent problem while doing my spark plugs at 80,000 miles. The dealership was the one that did my spark plugs at 40,000 miles. Sure enough, they broke Cylinder 3\u2019s wiring harness connector to the coil pack and stripped the bolt. I had to helicoil the bolt, replace the connector, and repin the connector.
Pros: connector replaced, bolt helicoiled
Cons: connector broken, bolt stripped
Vehicle:
Volkswagen
Mileage: 128748 km
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