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      11-06-2014, 06:54 PM   #1
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New spark plugs, air filter

I replaced my plugs and air filter this morning. BIG difference!
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      11-06-2014, 07:01 PM   #2
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How many miles on the plugs?
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      11-06-2014, 07:07 PM   #3
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      11-07-2014, 12:34 PM   #4
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I just replaced my plugs and im at 52K, dont know if previous owner replaced them but I got her at 36k... revs smooth as butter
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      11-07-2014, 01:02 PM   #5
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I noticed a smoother idle after changing my plugs
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      11-07-2014, 01:24 PM   #6
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I'm at 76k miles and I have NEVER changed my spark plugs nor air filter............ still runs fine (or so I think)
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      11-07-2014, 01:28 PM   #7
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Quote:
Originally Posted by abehwang View Post
I'm at 76k miles and I have NEVER changed my spark plugs nor air filter............ still runs fine (or so I think)
Man, I'd take a look at the filter as well as the filter box. You'd be surprised what you'll find there...

And it's a 10min job!
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      11-07-2014, 01:41 PM   #8
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Quote:
Originally Posted by abehwang View Post
I'm at 76k miles and I have NEVER changed my spark plugs nor air filter............ still runs fine (or so I think)
The spark plugs is regular service about every 30k miles or so. The dealer should have changed it once during the warranty period if you take the car to the dealer for service.

If not... change that stuff right away. You don't want the spark plugs to fail and leave you stranded on the road.
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      11-07-2014, 03:26 PM   #9
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Quote:
Originally Posted by abehwang View Post
I'm at 76k miles and I have NEVER changed my spark plugs nor air filter............ still runs fine (or so I think)


I would definitely change the filter ASAP. Dirty air can have adverse affects on your engine condition.
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      11-07-2014, 04:33 PM   #10
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Quote:
Originally Posted by abehwang View Post
I'm at 76k miles and I have NEVER changed my spark plugs nor air filter............ still runs fine (or so I think)
Dude.
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      11-07-2014, 04:55 PM   #11
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Quote:
Originally Posted by abehwang View Post
I'm at 76k miles and I have NEVER changed my spark plugs nor air filter............ still runs fine (or so I think)
what?
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      11-07-2014, 10:58 PM   #12
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Its a shame people who own this car often doesn't realize their spark plugs are playing a much larger role in this engine than typical plugs. Your engine depends on clean plugs to get accurate evaluation of the knock risk and thus dials back timing and thus power.

Wont go into details but 76k on plugs is just stupid and your probably losing 25hp
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      11-07-2014, 11:32 PM   #13
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Quote:
Originally Posted by abehwang View Post
I'm at 76k miles and I have NEVER changed my spark plugs nor air filter............ still runs fine (or so I think)
uuh

if you did your scheduled maintenance while it was free, they were likely replaced without you knowing it.

and you could probably forget about selling your car on this forum if someone searches your previous posts.

i bought my car from another member of this forum, and i looked at all his posts to make sure there were no skeletons under the hood (along with a ppi). i imagine its a common practice.
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      11-08-2014, 12:09 AM   #14
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Quote:
Originally Posted by abehwang View Post
I'm at 76k miles and I have NEVER changed my spark plugs nor air filter............ still runs fine (or so I think)
Well, we may have established a possible contributing factor to why there is a bearing issue in some cars and not in others....maintenance.

Last edited by Sinful; 11-08-2014 at 01:04 PM.
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      11-08-2014, 01:18 AM   #15
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Quote:
Originally Posted by abehwang View Post
I'm at 76k miles and I have NEVER changed my spark plugs nor air filter............ still runs fine (or so I think)
I hope this is a joke but...man, if someone on an enthusiast forum does this, imagine how bad some M3's are cared for outside of this forum...
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      11-08-2014, 06:04 PM   #16
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One thing I have noticed is since the plug replacement my car is running about 5 - 10 degrees hotter than before. I have the BMW perf steering wheel which monitors the oil and water temps digitally. Any thoughts? I talked to my service advisor and he said it shouldn't be a problem but keep an eye on it it.
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      11-08-2014, 08:52 PM   #17
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i put an AFE intake on at around 30k miles. HUGE performance increase i attribute to the OEM Air filter absolutely COATED in dead bugs and grime...

I think it's time for a plug change, especially since the rear O2 is probably throwing off the A/F Ratios. Im curious to see the color of the plugs...

Heard Platinums are not the best for the S65, what kind of blugs are OEM? And are they a nightmare to change?
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      11-09-2014, 12:01 AM   #18
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Quote:
Originally Posted by DKM3Power View Post
i put an AFE intake on at around 30k miles. HUGE performance increase i attribute to the OEM Air filter absolutely COATED in dead bugs and grime...

I think it's time for a plug change, especially since the rear O2 is probably throwing off the A/F Ratios. Im curious to see the color of the plugs...

Heard Platinums are not the best for the S65, what kind of blugs are OEM? And are they a nightmare to change?
Platinum, lol, I've never read anything mentioning electrode material being good or bad for the S65.
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      11-09-2014, 01:25 AM   #19
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Someone mentioned to me that high end iridium (I think is how it's spelled) makes a much more powerful spark for a fuller burn, and that platinum electrodes are great they aren't as conductive as iridium and under the insane dynamic compression (Which increases resistance obviously/High desnsity more air & fuel to pass through) It will be a weaker spark and thus less compete burn and less dramatic combustion...

I'm sure they work great, but I've just read this from some reputable sources...Someone that knows more should chime in bc I'm about to order some... lol
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      11-09-2014, 02:00 AM   #20
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Just changed plugs last week, and noticed a big difference. Filter will be swapped in the morning!

Quote:
Originally Posted by abehwang View Post
I'm at 76k miles and I have NEVER changed my spark plugs nor air filter............ still runs fine (or so I think)
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      11-09-2014, 05:42 PM   #21
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I Just replaced my plugs last week (routine maintenance at 100k km).
I noticed less delay at initial start-up in the morning, and smoother revs and idle.
Nice!
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      11-09-2014, 06:49 PM   #22
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Anything special? Or just OEM? I was leaning OEM or OE...Guessing Bosch makes the "OEM" plugs?
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