I'm going to keep using NGK's though. The farm-supply store has a whole aisle of them and they're all $1.59 each . I've put them in vehicles where the OE's are Delco, Bosch, Champion, Motorcraft, or Denso and they've all run perfectly with the NGKs.
For the cars that call for the silvers as the OE plugs, there is no better choice [than the silvers].
about ten years ago, when my Beetle was my DD, I used nothing but Bosch Super (the cheap copper ones) and never had an issue.
Out of all the plugs I've tried, standard NGK V-powers are the only ones that have consistently worked well in *everything* I've stuck them in. From single-cylinder lawnmowers to high-winding Japanese 4s to domestic and imported V6s to big-inch V8s. They're worth the extra 40 cents over Champs or Autolites.
When I switched to NGK's it seemed to run better
I just put new plugs in (NGK Iridium IX) and the engine does not shake/miss fire as much as before.
The plug wires do not make a difference. We interchange them all the time here at work (I work at a dealership as well) if need be and there are no adverse effects. All they do is carry the electricity. The plugs on the other hand, that could cause a problem.
i cant comment on the 24v specs, but the OEM 12v plug outperforms everything else i've tried.
Changed spark plugs, wires, cap/rotor with Bosch bits (w7dtc not those crappy +4s)
I was running the junky ford plugs with little to no issues and switched to those NGKs and now I will actually foul a plug in warmup. This has never happened before and I would venture to say they are my least favorite plugs at this time. I have never had these issues until the NGKs.
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