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Discussion Starter #1 (Edited)
So IV heard a lot of talk about Vt spark Plugs! I’m new to the VT cars
I have a 2015 all stock but I tend of putting in oil catch can and intake.

My VT is my daily and has 100000 miles on it also go on cruises occasionally with the buddy’s.
I like to drive pretty fast 65mph to 80. Lol
I was told I may need to put better plugs in since my plugs I get from Hyundai dealership always go out 4 to 5 months at a time
Which plugs are good for my type of VT and driving style/heat range?
Any suggestions as well on Engine/tuning mods?
Thanks!
 

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Important to get the right part
My car is a VT-2014-1600cc turbo-6SM-150KW (200HP)-RHD (spot the differences to U.S spec).
NGK: SILZKR6 B10E for NON TURBO (difference bein plug core 0.6mm wire / 5K ohm internal resistance / 1mm Gap)
NGK: SILZKR6 D 8E for TURBO (difference bein plug core 1.0mm wire / 10K ohm internal resistance / 0.8mm Gap)

I ended up buying the the wrong plugs for my VT (B10E's). Resulted in blowing 2 x ignition coils.
 

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Should replace all 4 coils for piece of mind.
 

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I don't agree. (should replace all 4)
Purchase 4
Replace the bad coil.
Keep the remaining for the next bad one to go.
 

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So, all in all I replaced 1 bad coil. Immediate improvement.
Originally two coils miss fired. Marked them A,B,C,D.
Coil C Miss fired irrespective of cylinder it was installed, CEL activated.
Coil D Miss fired only when bad coil C installed, CEL activated.
So replaced Coil C, checked and gapped all plugs.
Though there is still another bad coil (suspected D) very slight miss fire at high load.
Not enough for CEL to activate.

To be honest, without this experience, I probably wouldn't have noticed the very slight miss fire.
Starting to agree with RPW/Ricky. Think the coils lose capability over time and weaken. Noticed after replacing (C), idle much smoother.
BTW, rough idle was the original reason for changing the plugs, (which I got wrong, see above).
I've stayed with the original plugs, as they have only done 40,000 miles.
So. I've ordered another 3 new coils, Almost certain coil packs deteriorate relatively quickly in these cars.
 

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weekend racer
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Fwiw I’m at 117k original coil packs 3rd set of ngk plugs it runs like a dream.
 
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