NGK spark plug failure. Replacement interval?

GuyLedouche · 10-28-2023, 11:04 AM

Yesterday on my first lap of the day on track I felt my engine giving me the pulling timing/fuel feeling. I never got any codes. I went home and pulled the plugs and 5 & 6 failed as shown. The plugs were installed 2 years ago and have 20 track days and maybe a few thousand road miles on them. I run 93 pump gas and am on a bootmod3 track tune. Is this a yearly replacement item?

Also, for the engine experts. I scoped the cylinders and obviously 5 & 6 look a bit dirty since they weren’t sparking. Is this a problem or will it clean up when I get the car back together?

SYT_Shadow · 10-31-2023, 07:39 AM

We replace them yearly. NGK are the better ones, perhaps one of yours was defective.

domacuratl · 10-31-2023, 08:26 AM

I have been BM3 93 Octane Stage 2 tune since 2018 with over 107k on the odometer. My spark plug NGK interval which is gapped to .020 have been every 20,000-30,000 miles or 3 oil changes or about every 2-3 years. I mostly daily my car with some spirited driving here and there but nothing crazy. I would have to agree with SYT_Shadow if your tracking the car multipe times a year I would definitely replace yearly.

Theruleslawyer · 10-31-2023, 01:33 PM

Is it worth getting the colder ones for a stock engine?

SYT_Shadow · 10-31-2023, 02:04 PM

Quote:

Originally Posted by Theruleslawyer

Is it worth getting the colder ones for a stock engine?

NGK is what the M4 GT4 run... I haven't heard of something else that's better

FrankMstein · 10-31-2023, 02:23 PM

There are NGK counterfeits out there. I have breakup/dropouts and keep hearing "stick to OEM" and NGK have issues with breakup and I think the source for my power loss.

10-28-2023, 11:04 AM	#1
GuyLedouche Lieutenant 588 Rep 467 Posts Drives: F82/718 GT4 Join Date: Nov 2018 Location: NH iTrader: (2)	Yesterday on my first lap of the day on track I felt my engine giving me the pulling timing/fuel feeling. I never got any codes. I went home and pulled the plugs and 5 & 6 failed as shown. The plugs were installed 2 years ago and have 20 track days and maybe a few thousand road miles on them. I run 93 pump gas and am on a bootmod3 track tune. Is this a yearly replacement item? Also, for the engine experts. I scoped the cylinders and obviously 5 & 6 look a bit dirty since they weren’t sparking. Is this a problem or will it clean up when I get the car back together? Attached Images
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10-31-2023, 07:39 AM	#2
SYT_Shadow ///M Powered for Life 11490 Rep 10,329 Posts Drives: E90M/E92M/M4GTS/M4GT4/X5M Join Date: Sep 2010 Location: Greenwich, CT iTrader: (2)	We replace them yearly. NGK are the better ones, perhaps one of yours was defective. __________________ DIY: S65 Rod Bearings E9X PFC Z54 BBK on F8X BK harness bar + seats: fit 6 tires in an M3 do88 Cooling Goodies GTS Twins: GTMore project
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10-31-2023, 08:26 AM	#3
domacuratl New Member 29 Rep 21 Posts Drives: BMW M4 Join Date: Oct 2023 Location: Alabama iTrader: (0)	I have been BM3 93 Octane Stage 2 tune since 2018 with over 107k on the odometer. My spark plug NGK interval which is gapped to .020 have been every 20,000-30,000 miles or 3 oil changes or about every 2-3 years. I mostly daily my car with some spirited driving here and there but nothing crazy. I would have to agree with SYT_Shadow if your tracking the car multipe times a year I would definitely replace yearly.
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10-31-2023, 01:33 PM	#4
Theruleslawyer Captain 1019 Rep 836 Posts Drives: 2019 m4 Join Date: Apr 2022 Location: Chicagoland iTrader: (0)	Is it worth getting the colder ones for a stock engine?
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10-31-2023, 02:23 PM	#6
FrankMstein Captain 1020 Rep 910 Posts Drives: F80 M3, R56 Camden, G37x Join Date: Jun 2021 Location: Charlotte iTrader: (1)	There are NGK counterfeits out there. I have breakup/dropouts and keep hearing "stick to OEM" and NGK have issues with breakup and I think the source for my power loss.
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