E90Post
 


 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > Any way to pull an oil sample without doing an oil change?



Reply
 
Thread Tools Search this Thread
      11-01-2012, 12:52 PM   #1
gpb
First Lieutenant
3
Rep
393
Posts

 
Drives: 335i Cabrio
Join Date: Sep 2012
Location: Atlanta

iTrader: (0)

Any way to pull an oil sample without doing an oil change?

New to me 2010 E93 and I'd like to do an oil analysis prior to the next oil change interval. I don't really want to do an early oil change and am not sure I trust a dealer mechanic to pull a sample for me mid-stream. Call it a control issue but I'd prefer to pull the sample myself.

On other vehicles it'd be easy enough to pull a sample through the dipstick tube. With no dipstick, I'm not sure how to proceed.

Any suggestions? I searched but came up empty handed.
Appreciate 0
      11-01-2012, 03:44 PM   #2
F32Fleet
BMWCCA since '03
F32Fleet's Avatar
United_States
69
Rep
5,339
Posts

 
Drives: 2015 435i
Join Date: May 2005
Location: Atlanta (Vinings)

iTrader: (0)

Nope.
Appreciate 0
      11-01-2012, 04:09 PM   #3
raceyBMW
king of the hills
raceyBMW's Avatar
United_States
29
Rep
2,832
Posts

 
Drives: 335i coupe
Join Date: Dec 2006
Location: Denver, CO

iTrader: (1)

Garage List
1994 530i  [4.25]
2007 335i Coupe  [4.07]
You might be able to pull the filter cap off and lift the filter out to get some pooled oil in there (and keep the oil that's drained from the filter), depending on how much you need...but that is probably about it.
Appreciate 0
      11-02-2012, 01:41 PM   #4
FCobra94
Major
FCobra94's Avatar
16
Rep
1,411
Posts

 
Drives: '07 E90 335i
Join Date: Dec 2011
Location: MD

iTrader: (0)

I attempted to do this before my last oil change, but it seemed too messy of a task; especially with a hot engine/oil. Anyway, my intended plan was to cut the top off of a milk jug or oil jug, let a couple quarts of oil run out, grab the sample, and then quickly put the drain plug back in. Then of course, return the caught oil back into the fill hole...as I mentioned though, I lost confidence given the potential for making a huge mess in my garage, even with quite a large catch pan underneath lol
__________________
'07 E90 335i - Automagic - Non-sport
Cobb AP|Alpina Flash|VRSF 7" FMIC|VRSF CP|TIAL BOV|cp-e DCI|Bilstein B6|E93 M3 FSB|SP Lowering Perches
Summer: Sonic Tuning ST100 - 18x8.5 ET35 - Conti DWS 245/40/18 - 10mm rear spacers
Winter: Style 159 - 17x8 ET34 - Michelin X-Ice Xi2 225/50/17 - 15mm rear spacers
Appreciate 0
      11-04-2012, 12:00 PM   #5
NoTempoLimitN54
Second Lieutenant
NoTempoLimitN54's Avatar
United_States
3
Rep
237
Posts

 
Drives: E92 335i
Join Date: Sep 2012
Location: Los Angeles, CA

iTrader: (1)

Garage List
YES. Buy the suction pump oil sample kit from Blackstone, and an oil filter cap wrench.

http://www.blackstone-labs.com/vacuum-pump.php

You'll also need a 27mm socket and a torque wrench (25 Nm) if you don't have them.

Pull the filter (leave on cap housing) and use the tubing (cut down) to suck oil out from the oil filter housing. You have to work fast before it drains away. You can definitely get enough for a UOA sample.

I did this successfully about a month ago. The only thing to keep in mind is that your wear metals in analysis may be slightly higher because you are sampling where the oil is being filtered. But the results are still valid.
__________________

2009 335i 6MT (E92/N54), Black Sapphire / Shadowline (Individual 760) / Black Dakota Leather, ZSP, ZCW, 6FL, PDC, no Nav/iDrive, 19 x 8.5 / 19 x 9.5 VMR VB3 in Hyper Black, Pilot Super Sport 235/35 fr 265/30 rr, M3 control arms + tension links (fr)
Appreciate 0
      11-04-2012, 02:27 PM   #6
F32Fleet
BMWCCA since '03
F32Fleet's Avatar
United_States
69
Rep
5,339
Posts

 
Drives: 2015 435i
Join Date: May 2005
Location: Atlanta (Vinings)

iTrader: (0)

Just an fyi. Without the published condemnation levels from BMW for your engine a single pass UOA is of limited value in terms of wear metals.
Appreciate 0
      11-05-2012, 08:27 AM   #7
gpb
First Lieutenant
3
Rep
393
Posts

 
Drives: 335i Cabrio
Join Date: Sep 2012
Location: Atlanta

iTrader: (0)

Thanks folks.

NoTempoLimitN54: great thought - I have a MityVac so it shouldn't be difficult to pull a sample.

Socom: interesting point. My intent is to get a feel for where the internals stand, so I'd wanted to catch a sample of this used oil and then do another UOA at around 7500mi into the next oil, comparing the results of the two. The caveat being that most of the miles on this oil were put on by a former owner, so that limits the comparison.
Appreciate 0
      11-06-2012, 09:57 AM   #8
NoTempoLimitN54
Second Lieutenant
NoTempoLimitN54's Avatar
United_States
3
Rep
237
Posts

 
Drives: E92 335i
Join Date: Sep 2012
Location: Los Angeles, CA

iTrader: (1)

Garage List
Blackstone provides "universal averages" which is the wear metals in ppm from other similar engines. So you do have something to compare to. You can also confirm viscosity from the sample.

If you sample consistently, you can compare wear metals and see how different oils and additives affect that.

That's how I figured out on my high mileage E39 that adding ZDDP and Moly noticeably decreased engine wear.

Yes - an engine oil additive that works!
__________________

2009 335i 6MT (E92/N54), Black Sapphire / Shadowline (Individual 760) / Black Dakota Leather, ZSP, ZCW, 6FL, PDC, no Nav/iDrive, 19 x 8.5 / 19 x 9.5 VMR VB3 in Hyper Black, Pilot Super Sport 235/35 fr 265/30 rr, M3 control arms + tension links (fr)
Appreciate 0
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 08:24 PM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST