The NGK's worked beautifuly.
Pros: worked beautifully
Vehicle:
Mazda
Owner reviews for spark plug
Manufacturers
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I have a 2010 Silverado, and I had a 2011 Silverado. Go with the Delco's. It what your truck was built with, it what she will run best with.
If you do go with something else. Stick with a denso, or an NGK. Avoid Bosch plugs in that truck like the plague or you will start tripping codes.
Pros: runs best with Delco
Cons: avoid Bosch plugs
Vehicle:
Chevrolet Silverado
I used NGK, 6 month no issues.
Pros: no issues
Get NGK plugs instead...mine have been working great.
Pros: working great
I'm currently is20 United 91 octane tune, APR packs and NGK RS7 plugs (one step colder thant oem), gapped at around 0,028'' and car feels solid. No misfire, no EPC. However it honestly feels just like when I was with oem coilpacks and plugs. Maybe now idle feels a little bit smoother.
Pros: solid performance, smoother idle
Cons: similar to OEM
Vehicle:
Volkswagen Golf
Part number: RS7
I’m now running factory heat range NGK 94833 plugs gapped at 0.03 and the car runs so much cleaner.
Pros: runs much cleaner
Vehicle:
Volkswagen Golf
Part number: 94833
And also removed and cleaned my spark plugs. All these collectively seemed to have a great impact on the engine\u2019s performance! The engine runs much smoother and feels a lot more sporty!
Pros: engine runs smoother
Vehicle:
Volkswagen Jetta
I bought six ac delco spark plugs from Rockauto and half were made in France and half were made in the US. There are very slight differences like the diameter of the electrode and how deep the plug is on the end that goes into the cylinder. Even one of the US plugs is different from the other two.
Cons: slight differences in plugs
I've heard for many decades how bad Bosch spark plugs are and I figured the coils would be just as bad, if not worse.
Cons: bad quality
Bosch spark plugs are junk.
Cons: junk
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