I have been using them, never had problems. Start up is faster, idle is smoother, throttle feels more responsive.
Pros: faster start up, smoother idle, responsive throttle
Vehicle:
Volkswagen
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I switched to the Ikh24 and it really smoothed the car out.
Pros: smoothed car out
Part number: IKH24
So here is my experience with gaps on this engine. The wife 09 Passat was misfiring so I decide to replace the plugs. I buy Autolite double platinums which were gapped huge. Turns out the 0.032 gap was not correct after all and it should have been 0.028. Big difference, this baby flies again (GIAC tune).
Pros: baby flies again
Cons: misfiring, gapped huge
Vehicle:
Volkswagen Passat
I paid $42 for the ACDelco iridium plugs, $45 for the ACDelco pro wire set.
Pros: iridium plugs, pro wire
GM products run best with AC Delco plugs, just like Ford products run best with Motorcraft or Autolite.
Pros: best performance
Replaced my OEMs this summer to Denso K16GPR-U11 and has been getting really good mileage and smooth idling since then. Now planning to try NGKs next time.
Pros: good mileage, smooth idling
Vehicle:
Volkswagen
Part number: K16GPR-U11
I miss my NGK V powers. I always ran them in my 1.8T's and changed them every oil change because they were so cheap to buy. Put these in and she's as smooth as butter. Torque profile feels better at partial throttle too. Needless to say I am very happy.
Pros: smooth idle, better torque, cheap to buy
Vehicle:
Volkswagen
I'm running a Blue coil (only because the blue is cool), a compufire, and bosch plugs and wires. The blue coil is juat something to look at. You really wont notice a difference.
Cons: no noticeable difference
Most imports (To the US) don't like anything but NGK/Denso.
Cons: imports don't like
I found Bosch platinum plugs misfired intermittently on GM v8s with the optispark distributor despite being identical to the Delcos.
Cons: misfired intermittently
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