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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 09-01-2008, 08:13 PM
Dans540beast Dans540beast is offline
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Mein Auto: 1998 540i 6spd.
Best spark plugs fro 540i

Anybody have advice on the best plugs for my '98 540i....I don't think they've ever been replaced and I have about 176000km. I bought it at 150K.
Should I stick with the orig. (Bosch I assume) or try NGK (saw on ebay)?

THANKS
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  #2  
Old 09-01-2008, 08:25 PM
GSXRYDER GSXRYDER is offline
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Use the search there have been wars about this

But, I use the Champion Iridums and absolutely love them...so has everyone that tries them. Also come highly recommended is the Denso Iridiums a lot of people here like to use the stock or NGK plugs. I say try the new ones you will like them...nothing wrong with the NGK iridiums but the Ratings for the Champions are the highest with the Denso a very close second...

Let us know what you decide and how it goes for you...
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  #3  
Old 09-01-2008, 09:05 PM
3rdDegree 3rdDegree is offline
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I just put a set of Pulstar Pulse plugs in mine and I swear by them. Noticed the difference in power immediately. I have been driving it hard, really hard. I am still averaging 20.2 mpg. They are spendy, but in my opinion, well worth it.
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  #4  
Old 09-01-2008, 09:32 PM
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POof540i POof540i is offline
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Quote:
Originally Posted by GSXRYDER View Post
Use the search there have been wars about this
+1, use the search feature and you'll find lots of information about this topic.

My two cents... I use stock. I changed them at 108k miles not knowing when the previous owner changed them, if ever, and didn't notice a difference in performance. GL.
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  #5  
Old 11-08-2008, 11:45 AM
01330Xi 01330Xi is offline
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Hey 3rdDegree, any updates on the Pulstars? I am thinking about getting a set for my E32, but am worried about the increased pressure causing excessive blow by on a motor with 170000 miles. Did you notice a big difference in fuel economy? Does the car idle smoother?
Thanks.
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  #6  
Old 11-28-2008, 03:41 AM
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Schnell!!! Schnell!!! is offline
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NGK.......
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  #7  
Old 11-28-2008, 06:20 AM
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Michael Star Michael Star is offline
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I think I bought NGKs last time?
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  #8  
Old 11-28-2008, 07:47 AM
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demas demas is offline
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Oem

search for your OEM plugs here and go with those
http://www.realoem.com/bmw/

you will initially feel a slight performance increase with new plugs - if you happen to go non OEM and are surprised with the results, doesn't mean they are superior - just new plugs.
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  #9  
Old 11-28-2008, 08:17 AM
Schnell!!!'s Avatar
Schnell!!! Schnell!!! is offline
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And NGKs are good too... OEM... they were fancy two prongs before fancy two prongs were cool
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  #10  
Old 02-18-2009, 01:42 AM
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drakar drakar is offline
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Mein Auto: 2000 540i/A Sport
Question

has anyone checked these out?
found them on sparkplugsDOTcom
$25 each sounds completely excessive..
but i do like to buy the best for my baby..
can they really be this good????

any thoughts?

Quote:
Pulstar Pulse Plug

Pulse plugs are the latest in performance ignition technology. They are essentially a spark plug with an internal pulse circuit which increases peak spark current by up to 20,000 times as compared to a traditional spark plug. Their physical dimensions are the same as your stock spark plug. But this is where the similarity ends. Pulse plugs incorporate a pulse circuit, which stores incoming electrical energy from the ignition system and releases it in a powerful pulse of power. Instead of 50 watts of peak power, typical of a spark plug, pulse plugs deliver up to 1,000,000 watts of peak power. This allows Pulstar Pulse Plugs to burn fuel more efficiently than traditional spark plugs. Pulstar plugs generate a much larger spark than spark plugs and at twice the speed. This faster ignition generates more power you will feel in a livelier throttle response, more horse power to the wheels and increased gas mileage.
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  #11  
Old 02-18-2009, 01:46 AM
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drakar drakar is offline
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i got that and others from this link for my 540i
http://www.sparkplugs.com/results_ap...1&AAIA=1358300

i do want the best for my baby
and price doesnt concern me as much as getting ripped off buying junk
i would buy the $25 plugs if they were better then the rest..
so,, are they? i need opinions..
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  #12  
Old 02-18-2009, 05:04 AM
jdjg jdjg is offline
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Quote:
Originally Posted by drakar View Post
i got that and others from this link for my 540i
http://www.sparkplugs.com/results_ap...1&AAIA=1358300

i do want the best for my baby
and price doesnt concern me as much as getting ripped off buying junk
i would buy the $25 plugs if they were better then the rest..
so,, are they? i need opinions..
NGK baby... all the way....
Here in Panama, at the BMW Dealer, one spark $22.50 (NGK)......
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  #13  
Old 02-18-2009, 11:16 AM
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drakar drakar is offline
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Mein Auto: 2000 540i/A Sport
thx for the response, but i want to know about pulstar plugs,, has anyone ever heard of them before?
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  #14  
Old 02-18-2009, 11:57 AM
Mfivestar Mfivestar is offline
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Quote:
Originally Posted by drakar View Post
thx for the response, but i want to know about pulstar plugs,, has anyone ever heard of them before?
I found this info by searching the forum, try to search next time you might find what your lookn for a little sooner. Hope this helps you out.


http://www.bimmerfest.com/forums/sho...ht=pulse+plugs


After testing, the Pulstar plug had a horsepower advantage, having both the highest peak horsepower (205.95hp) and the
highest average horsepower (204.04hp). The NGK Iridium IX showed the second highest average horsepower (203.78hp),
and highest average torque (230.27 lb-ft.), however, the NGK Iridium IX also displayed the most reliable and consistent
horsepower figures. The Denso iridium showed the highest peak torque (235.96 lb-ft.), third highest average horsepower
(203.67hp), and second highest peak horsepower (205.51hp) and average torque (229.74 lb-ft.).
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  #15  
Old 02-18-2009, 12:03 PM
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540 M-Sport 540 M-Sport is offline
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Quote:
Originally Posted by Mfivestar View Post
I found this info by searching the forum, try to search next time you might find what your lookn for a little sooner. Hope this helps you out.





After testing, the Pulstar plug had a horsepower advantage, having both the highest peak horsepower (205.95hp) and the
highest average horsepower (204.04hp). The NGK Iridium IX showed the second highest average horsepower (203.78hp),
and highest average torque (230.27 lb-ft.), however, the NGK Iridium IX also displayed the most reliable and consistent
horsepower figures. The Denso iridium showed the highest peak torque (235.96 lb-ft.), third highest average horsepower
(203.67hp), and second highest peak horsepower (205.51hp) and average torque (229.74 lb-ft.).

A 1% difference in hp is the spread between the 3. This would be undetectable in driving, and probably exceeds the accuracy of the dynometer used...meaning if it was done again, the order may very well change.
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  #16  
Old 02-18-2009, 12:05 PM
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540 M-Sport 540 M-Sport is offline
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Quote:
Originally Posted by drakar View Post
has anyone checked these out?
found them on sparkplugsDOTcom
$25 each sounds completely excessive..
but i do like to buy the best for my baby..
can they really be this good????

any thoughts?
SNAKE OIL! You think any car manufacturer that could magically improve the fuel efficiency of their engines by simply using a better spark plug, would not take advantage of that technology?
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  #17  
Old 02-18-2009, 12:21 PM
Mfivestar Mfivestar is offline
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Quote:
Originally Posted by 540 M-Sport View Post
SNAKE OIL! You think any car manufacturer that could magically improve the fuel efficiency of their engines by simply using a better spark plug, would not take advantage of that technology?
They might be better spark plugs(pulse plugs) idk, but I read that they only have half the life span of a regular spark plug, so they cost more and you need to change them more often. Maybe thats why car comps dont use them
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  #18  
Old 01-28-2012, 10:58 AM
UsedBits UsedBits is offline
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Location: Central Arkansas
 
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Mein Auto: 2002 540iA with sport pkg
Quote:
You think any car manufacturer that could magically improve the fuel efficiency of their engines by simply using a better spark plug, would not take advantage of that technology?
The manufacturer is not primarily concerned with power. Instead, cost of production is number one on the list. Yes, manufacturers are concerned with $1/car cost increases. This means that if a particular plug reasonably fires the fuel/air mix and a more expensive plug does so a little better, the cheaper plug gets the nod.

I recall stories about GM 're-engineering' the LT1 platform to provide a 10% increase in horsepower. The moment this was achieved, the work to improve it was stopped. In this case, the work was primarily in reducing turbulence in the intake and exhaust ports and, ultimately, did not materially increase the manufacturing cost of the engine. So why stop at some arbitrary point (10%)? (To cut the cost of the re-engineering.)
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2002 e39 (540iA) with factory 'sport package' modified with:
'03 fr. and r. bumpers, front air ducts, and spoiler
18" Staggered MPars (style 37)
Dinan exhaust
shorter springs
European center console arm rest
VECTOR radar detector (non-working)

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  #19  
Old 06-17-2014, 10:44 PM
zügig zügig is offline
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  #20  
Old 06-18-2014, 12:00 AM
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bluebee bluebee is offline
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Mein Auto: 02 BMW 525i M54 auto 130K
See also:
- BMW spark plug application charts (1) (2) & the best plug to use (1) (2) & a deciphering key (1) & keys to reading plugs (1) & the truth about torque & anti-seize (1) & the truth about gap (1) (2) & DIYs for replacing spark plugs (1) (2) (3) (4) (5) (6)
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Please read the suggested threads, where the best always add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need
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  #21  
Old 06-18-2014, 06:08 AM
zügig zügig is offline
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  #22  
Old 06-18-2014, 10:47 AM
Crutzy Crutzy is offline
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Why bother following BMW recommendations when the kid at the parts store has so many better ideas.
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