NGK-Ruthenium HX Plugs- Anyone have this?

VictorH · 09-27-2020, 02:38 PM

I just changed my plugs on my car due to slightly longer crank and start. I had 30,000 miles on the OEM-type NGK plugs. Switched to NGK Ruthenium HX plugs (LKR8BHX-S). Only change are the plugs and now the car runs fine for 20 minutes then I get 2B37, 2B38 etc which is misfire, DME cylinder cut-off on every single cylinder 1-8 and of course it hardly runs, can't barely go 40 mph max. Clear codes and it's good for a couple of minutes then same thing again.

Anyone try these new "improved" plugs? They are rated for S65, same 5,000 ohm rating but it's odd that it's such a mess for me. I checked my ground to block wire and added some conducting grease (it was okay), my coils are old, all have 154,000 miles but I've had no trouble and what are the odds that suddenly every single one is bad.

Anyway, I guess I'm going to try the regular OEM plugs again, but wondering if anyone has experienced this and if not perhaps these plugs are not an "upgrade" for our motors.

tdott · 09-27-2020, 02:54 PM

I see no reason to stray from OEM plugs.

Many others are available saying they work with s65, but I've only heard issues with them, never any success stories.

Dpc2u · 09-27-2020, 03:16 PM

Quote:

Originally Posted by tdott

I see no reason to stray from OEM plugs.

Many others are available saying they work with s65, but I've only heard issues with them, never any success stories.

+1

I have not heard of anyone having good results with them in an s65, just horror stories.

pbonsalb · 09-27-2020, 03:25 PM

A few tried them, all with bad experiences.

VictorH · 09-27-2020, 05:46 PM

That figures. Live and learn. When I torqued up the last spark plug yesterday, I thought, "that's the last time I have to change the plugs" since I'm planning to sell my M3 next spring. Well, evidently, not quite yet, one more change to go.
Appreciate everyone's input.

VictorH · 10-03-2020, 12:29 PM

Confirmed!!
The "fancy" NGK plugs are rubbish. Sent them back to suppler, installed the stock NGK plugs, went for long test-drive and all is good. For anyone else tempted to try these new "improved" plugs, stay away!

tlrid3r · 10-08-2020, 12:51 AM

I tried it. Car misfired all cylinders. I shared details here along with many others all failed as well:

ngk *lkr9bhx-s/NGK 90465 ? https://www.m3post.com/forums/showthread.php?t=1591014

Oem ngk is still the best

09-27-2020, 02:38 PM	#1
VictorH Major 433 Rep 1,286 Posts Drives: '09 M3 Join Date: Dec 2007 Location: SC iTrader: (4)	NGK-Ruthenium HX Plugs- Anyone have this? I just changed my plugs on my car due to slightly longer crank and start. I had 30,000 miles on the OEM-type NGK plugs. Switched to NGK Ruthenium HX plugs (LKR8BHX-S). Only change are the plugs and now the car runs fine for 20 minutes then I get 2B37, 2B38 etc which is misfire, DME cylinder cut-off on every single cylinder 1-8 and of course it hardly runs, can't barely go 40 mph max. Clear codes and it's good for a couple of minutes then same thing again. Anyone try these new "improved" plugs? They are rated for S65, same 5,000 ohm rating but it's odd that it's such a mess for me. I checked my ground to block wire and added some conducting grease (it was okay), my coils are old, all have 154,000 miles but I've had no trouble and what are the odds that suddenly every single one is bad. Anyway, I guess I'm going to try the regular OEM plugs again, but wondering if anyone has experienced this and if not perhaps these plugs are not an "upgrade" for our motors.
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09-27-2020, 02:54 PM	#2
tdott Brigadier General 3941 Rep 3,982 Posts Drives: M3 Join Date: Nov 2010 Location: South FL / 6ix iTrader: (4)	I see no reason to stray from OEM plugs. Many others are available saying they work with s65, but I've only heard issues with them, never any success stories.
	Appreciate 3 Dpc2u11503.00 Scharbag2620.50 ppatel1471.00 Quote

09-27-2020, 03:25 PM	#4
pbonsalb Lieutenant General 5228 Rep 10,611 Posts Drives: 18 F90 M5, 99 E36 M3 Turbo Join Date: Feb 2011 Location: New England iTrader: (4)	A few tried them, all with bad experiences.
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09-27-2020, 05:46 PM	#5
VictorH Major 433 Rep 1,286 Posts Drives: '09 M3 Join Date: Dec 2007 Location: SC iTrader: (4)	That figures. Live and learn. When I torqued up the last spark plug yesterday, I thought, "that's the last time I have to change the plugs" since I'm planning to sell my M3 next spring. Well, evidently, not quite yet, one more change to go. Appreciate everyone's input.
	Appreciate 0 Quote

10-03-2020, 12:29 PM	#6
VictorH Major 433 Rep 1,286 Posts Drives: '09 M3 Join Date: Dec 2007 Location: SC iTrader: (4)	Confirmed!! The "fancy" NGK plugs are rubbish. Sent them back to suppler, installed the stock NGK plugs, went for long test-drive and all is good. For anyone else tempted to try these new "improved" plugs, stay away!
	Appreciate 3 Dpc2u11503.00 tdott3941.00 tlrid3r513.50 Quote

10-08-2020, 12:51 AM	#7
tlrid3r just another M3 514 Rep 1,150 Posts Drives: e92 M3 Join Date: Dec 2007 Location: San Jose, ca iTrader: (6)	I tried it. Car misfired all cylinders. I shared details here along with many others all failed as well: ngk *lkr9bhx-s/NGK 90465 ? https://www.m3post.com/forums/showthread.php?t=1591014 Oem ngk is still the best __________________ ///M3... Don't want more power, Just want it to turn sharper one step closer each time. -Ohlins TTX Raceline, PolePostions seats, Akrapovic EVO, ARC-8, 1/2 Cage, Seat Delete, Stoptech BBK, solid Subframe and diff bushing, spherical bearing on everything.
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