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  #21  
Old 01-28-2020, 07:59 PM
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Iridium Plugs



You are running pretty lean!
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  #22  
Old 01-28-2020, 08:58 PM
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Need a lupe to read them correctly as there is lots of lighting issues and exposure issues with the posted images
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2005 X5 4.8IS
The Blue ones are always FASTER....

Current Garage:
2005 X5 4.8is
2002 M5 TiSilver
2003 525iT
1998 528i
Former Garage Stable Highlights
2004 325XiT Sport
1973 De Tomaso Pantera, L Model
1970 Dodge Challenger T/A 4 sp Alpine White
1970 Dodge Challenger T/A 4 sp GoManGo Green
1971 Dart Sport, “Dart Light” package
1969 Road Runner 383
1968 Ply Barracuda 340S FB Sea-foam Green
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  #23  
Old 01-28-2020, 09:38 PM
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Quote:
Originally Posted by Fifty150hs View Post
Is there a good place on line to buy them or should I get them from my local auto parts store?
Any big box local auto parts store should be fine - Advanced Auto, Pep Boys, O'reilly, Autozone, etc.

If I can get free shipping, ECS Tuning is a good source.

I don't like Rockauto that much because their stuffs usually arrived with boxes all smudged/dinged up, like they're from closed out inventories from people going out of business...if you know what I mean.
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  #24  
Old 01-28-2020, 10:27 PM
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I use fcp euro on any vehicle I plan to have for more than a year or so. That lifetime warranty comes in handy even though they are usually 5ish% more expensive than other etailers.

Quote:
Originally Posted by dkl View Post
Thanks for the info about Costco gas as I have been running it for the last couple of years on the X
No worries. I hear you on the cheapskate tendencies. I still use HEB (Texas grocer) premium most of the time vs other mainstream brands.

I have been experimenting with QT's ethanol free gas a little lately though. Will see how that goes.
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2005 X5 4.4i Build 04/05 Maintenance/Build Log
Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles)


2006 X5 4.8is Build 11/05 Maintenance/Build Log
Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles)

2010 X5 35d Build 02/10
Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)

Last edited by crystalworks; 01-29-2020 at 11:39 AM.
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  #25  
Old 01-29-2020, 10:50 AM
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Quote:
Originally Posted by dkl View Post
I guessed the "safe" things to do going forward is to do a Shell/Chevron fill up.

I use Shell premium. I got lazy a few times while shopping at Sam’s Club and used their fuel. Never again! I had problems every time. I never fill my E53 pass Half, I like to keep fuel as fresh as possible. I’ve also had fantastic results with Lucas fuel additive.
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  #26  
Old 01-29-2020, 03:24 PM
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Cool PLUG INFO

Now that I looked at these plugs on a larger screen, I can tell you they are NOT IRIDIUM NGK plugs. Take a peek at the center electrode diameter, it has to be 2x the correct dia size. By the way those little silver spots appear to be piston material from octane pinging (KNOCK) where combustion temps exceed 1200 degree F. NOTE: Aluminum melts at 1200 degrees. (See chart below) Cheap gas w/ poor blends (see Calif regs for details as you all get crap mixes to satisfy CA Research Board) results in really poor combustion consistencies tank over tank.

Call NGK direct to confirm with tech specialist who will have you read off the shell numbers and he can confirm manufacturing batch numbers.

Anything that has volume and profit attracts knockoff suppliers. Copying packaging is easier now than ever with high speed color scanner/printers. Welcome to technology. It happens on anything electronic, medical, and most consumer products. Happened in the fastener world where they flooded all SAE/Fractional grade 8/8+ bolts with similar marking on grade 4/6 bolts. Rotary craft started to fall out of the sky with blades missing as they sheared off. 80% of the US inventory was junk from offshore, heads were marked as if it was produced in the USA.

Aluminum 1220F
Aluminum Alloy 865 - 1240F
Attached Images
  
__________________

2005 X5 4.8IS
The Blue ones are always FASTER....

Current Garage:
2005 X5 4.8is
2002 M5 TiSilver
2003 525iT
1998 528i
Former Garage Stable Highlights
2004 325XiT Sport
1973 De Tomaso Pantera, L Model
1970 Dodge Challenger T/A 4 sp Alpine White
1970 Dodge Challenger T/A 4 sp GoManGo Green
1971 Dart Sport, “Dart Light” package
1969 Road Runner 383
1968 Ply Barracuda 340S FB Sea-foam Green

Last edited by StephenVA; 01-29-2020 at 04:03 PM. Reason: Added some plug 101 course materials
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  #27  
Old 01-29-2020, 04:07 PM
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Quote:
Originally Posted by StephenVA View Post
Now that I looked at these plugs on a larger screen, I can tell you they are NOT IRIDIUM NGK plugs. Take a peek at the center electrode diameter, it has to be 2x the correct dia size. By the way those little silver spots appear to be piston material from octane pinging (KNOCK) where combustion temps exceed 1200 degree F. NOTE: Aluminum melts at 1200 degrees. (See chart below) Cheap gas w/ poor blends (see Calif regs for details as you all get crap mixes to satisfy CA Research Board) results in really poor combustion consistencies tank over tank.

Call NGK direct to confirm with tech specialist who will have you read off the shell numbers and he can confirm manufacturing batch numbers.

Anything that has volume and profit attracts knockoff suppliers. Copying packaging is easier now than ever with high speed color scanner/printers. Welcome to technology. It happens on anything electronic, medical, and most consumer products. Happened in the fastener world where they flooded all SAE/Fractional grade 8/8+ bolts with similar marking on grade 4/6 bolts. Rotary craft started to fall out of the sky with blades missing as they sheared off. 80% of the US inventory was junk from offshore, heads were marked as if it was produced in the USA.

Aluminum 1220F
Aluminum Alloy 865 - 1240F
Thank you for the info. already ordered new Iridium plugs from Rockauto. Assume they'll be genuine. Doesn't the ECM adjust for knock to prevent it? I've been running nothing but premium, so signs of knocking are surprising.
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  #28  
Old 01-29-2020, 07:00 PM
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Quote:
Originally Posted by StephenVA View Post
Now that I looked at these plugs on a larger screen, I can tell you they are NOT IRIDIUM NGK plugs....
GREAT info. Thanks for posting. That had been my suspicion, but since I did not know enough, I was waiting for a more informed analysis.

Based on experience with all my cars and reading stuff like this situation online, I really think the #1 consideration when getting new spark plugs is to make sure they are not fake. Well, I guess after you make sure they thread in there. And after they do not collide with the pistons. But after that ...

When I got my '01 3.0i at around 169k miles, I soon replaced the plugs, just because I had no record of them being replaced and was foolishly dreaming of higher MPG. There was no change at all in anything about the car after replacing with the exact specified NGKs (but not genuine BMW). The ones that came out said BMW as well as NGK on them, and I'm pretty sure they were original. The electrodes looked close to perfect, even at that mileage.
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  #29  
Old 01-29-2020, 07:22 PM
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Quote:
Originally Posted by Fifty150hs View Post
Thank you for the info. already ordered new Iridium plugs from Rockauto. Assume they'll be genuine. Doesn't the ECM adjust for knock to prevent it? I've been running nothing but premium, so signs of knocking are surprising.
Glad to help
The knock sensor has to hear the knock and the O2 sensor info are compared then the injections respond with a longer or shorter pulse width (more or less fuel, think of a garden hose pistol more or less full on pulses)
Meanwhile the pinging has happened throughout the last 3-5 strokes.
New technology sees it at the per stroke. Oh and per cylinder. Ours only sees a bank not at the cylinder. Clogged injectors only make the issue worse. Add some Techron injector cleaner made by chevron if I remember correctly
__________________

2005 X5 4.8IS
The Blue ones are always FASTER....

Current Garage:
2005 X5 4.8is
2002 M5 TiSilver
2003 525iT
1998 528i
Former Garage Stable Highlights
2004 325XiT Sport
1973 De Tomaso Pantera, L Model
1970 Dodge Challenger T/A 4 sp Alpine White
1970 Dodge Challenger T/A 4 sp GoManGo Green
1971 Dart Sport, “Dart Light” package
1969 Road Runner 383
1968 Ply Barracuda 340S FB Sea-foam Green

Last edited by StephenVA; 01-29-2020 at 07:28 PM.
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  #30  
Old 01-29-2020, 07:24 PM
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Join Date: Jun 2013
Location: Virigina, USA
Posts: 2,155
StephenVA is on a distinguished road
Quote:
Originally Posted by oldskewel View Post
GREAT info. Thanks for posting. That had been my suspicion, but since I did not know enough, I was waiting for a more informed analysis.

Based on experience with all my cars and reading stuff like this situation online, I really think the #1 consideration when getting new spark plugs is to make sure they are not fake. Well, I guess after you make sure they thread in there. And after they do not collide with the pistons. But after that ...

When I got my '01 3.0i at around 169k miles, I soon replaced the plugs, just because I had no record of them being replaced and was foolishly dreaming of higher MPG. There was no change at all in anything about the car after replacing with the exact specified NGKs (but not genuine BMW). The ones that came out said BMW as well as NGK on them, and I'm pretty sure they were original. The electrodes looked close to perfect, even at that mileage.
Glad to help you also
Fake plugs just started as it was a non issue when I worked for Champion. There were a few Mexico shops buying old stock and repackaging them and then stuffing them into the market. One group even picked up old plugs, cleaned them and resold them in sets! The labor must have been cheap!
__________________

2005 X5 4.8IS
The Blue ones are always FASTER....

Current Garage:
2005 X5 4.8is
2002 M5 TiSilver
2003 525iT
1998 528i
Former Garage Stable Highlights
2004 325XiT Sport
1973 De Tomaso Pantera, L Model
1970 Dodge Challenger T/A 4 sp Alpine White
1970 Dodge Challenger T/A 4 sp GoManGo Green
1971 Dart Sport, “Dart Light” package
1969 Road Runner 383
1968 Ply Barracuda 340S FB Sea-foam Green
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