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Old 02-07-2012, 12:12 PM   #1
albarran9
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Where is my oil going?

I'm losing about half a quart every 500 miles. I've taken it to the dealership to see if they can diagnose it and they are unable to do so. I've changed the CCV (cold climate) and oil filter housing gasket. I don't get any clouds of smoke when driving that would indicate burning oil. I also don't see any oil stains on my garage floor on or the engine. I've checked for fresh oil around the engine block and nothing. Any help on what else I should be looking for? Wold the spark plugs be causing this or the valves/piston seals and rings? Spark plugs changed last at 85k miles.

Miles: 107,000
Oil: Mobile 1 0w-40 European formula
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Old 02-07-2012, 12:22 PM   #2
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Pull the spark plugs out, see if they are charred. If they are black that means its burning some oil as well.
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Old 02-07-2012, 01:19 PM   #3
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maybe its just being burnt. with a CAT, its hard to see the smoke.
do a compression also check CCV operation.
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Old 02-07-2012, 01:45 PM   #4
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The CCV seems to be working fine. I got put in the first week on January. Would chard spark plugs indicate that the oil is getting past the piston rings and therefore bad rings?
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Old 02-07-2012, 02:01 PM   #5
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Valve covet gasket leaks towards the rear and the ouk gets burnt on top of the headers before making it past and onto your splashguard. New vcg gasket solved my problem years ago and is recommended at around 80 k.

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Old 02-07-2012, 02:02 PM   #6
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Originally Posted by albarran9 View Post
The CCV seems to be working fine. I got put in the first week on January. Would chard spark plugs indicate that the oil is getting past the piston rings and therefore bad rings?
if its got yellow build up then yes.
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Old 02-07-2012, 02:07 PM   #7
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If all else fails, mix 20% of your oil capacity with Lucas Oil Stabilizer. Works great on my beaters and eliminates cold starts, thus decreased wear on the engine.
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Old 02-07-2012, 07:58 PM   #8
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I'm going to check my spark plugs on Thursday and look around the rear of the engine block to check the VCG for leaks there. My engine runs fine when I drive it. I would suspect that if oil was getting past the piston rings it would cause the enige to shake? I'll look into the Lucas oil stabilizer AC_2007. I use their fuel injector clear and have good results. I'm going to change the oil too so I can get a better read out of oil consumption and go with Castrol OEM oil. I'll probably add Seafoam into the crank case too to clean out any gunk right before the oil change.
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Old 02-07-2012, 08:02 PM   #9
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Believe it or not the gunk is probably what's keeping your engine from burning even more oil. I'd advise against the use of seafoam in the crankcase for your situation.
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Old 02-08-2012, 03:18 AM   #10
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Originally Posted by jasonbimmer View Post
if its got yellow build up then yes.
Hi Guys, i have the same issue (Losing oil with no visible leaks).

I checked my plugs last night and there was a lot of black gunk on it (more gunk on Sparkplugs from Cyl 1 and 2).
Also found some oil on the treads of the spark plug itself.
The white part of the spark plugs also had a yellow/brownish colour on the one end.

This is worrying...
Does this mean my rings are going bad?
Will a new VCG kit help with the oil around the threads of the plug?

Last edited by vimal32; 02-08-2012 at 03:19 AM.
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Old 02-08-2012, 03:40 AM   #11
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Quote:
Originally Posted by vimal32 View Post
Hi Guys, i have the same issue (Losing oil with no visible leaks).

I checked my plugs last night and there was a lot of black gunk on it (more gunk on Sparkplugs from Cyl 1 and 2).
Also found some oil on the treads of the spark plug itself.
The white part of the spark plugs also had a yellow/brownish colour on the one end.

This is worrying...
Does this mean my rings are going bad?
Will a new VCG kit help with the oil around the threads of the plug?
Are you using the correct spec oil??
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Old 02-08-2012, 04:28 AM   #12
vimal32
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Are you using the correct spec oil??
Hey Sprintman,
using Liqui Moly 5w-30 Synthetic as recommended by my BMW Tech.
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Old 02-08-2012, 10:23 AM   #13
MachRc
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Quote:
Originally Posted by albarran9 View Post
I'm going to check my spark plugs on Thursday and look around the rear of the engine block to check the VCG for leaks there. My engine runs fine when I drive it. I would suspect that if oil was getting past the piston rings it would cause the enige to shake? I'll look into the Lucas oil stabilizer AC_2007. I use their fuel injector clear and have good results. I'm going to change the oil too so I can get a better read out of oil consumption and go with Castrol OEM oil. I'll probably add Seafoam into the crank case too to clean out any gunk right before the oil change.
you can remove the splash guard and see if you got oil there. That will give you definite answer, or even stick your hand in to feel out the area with your hand. VCG will go on most if not all cars and this will occur.


not that you need to but if you want

Quote:
To remove the underbody tray cover (six screws with Phillips head). After you remove it, slide the cover towards the rear of the car.
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Old 02-08-2012, 11:42 AM   #14
jasonbimmer
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Quote:
Originally Posted by vimal32 View Post
Hi Guys, i have the same issue (Losing oil with no visible leaks).

I checked my plugs last night and there was a lot of black gunk on it (more gunk on Sparkplugs from Cyl 1 and 2).
Also found some oil on the treads of the spark plug itself.
The white part of the spark plugs also had a yellow/brownish colour on the one end.

This is worrying...
Does this mean my rings are going bad?
Will a new VCG kit help with the oil around the threads of the plug?
if you VCG is leaking, it could go on to the connector end of the plugs.
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Old 02-08-2012, 02:24 PM   #15
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Hey Sprintman,
using Liqui Moly 5w-30 Synthetic as recommended by my BMW Tech.
Change to an LL01 spec XW40
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Old 02-09-2012, 06:30 AM   #16
vimal32
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Thanks A lot guys...I think i'll do the valve cover gasket some time soon.
@ jasonbimmer - my plugs dont seem to be oil fouled according to your pic - it looks somewhere between "Carbon Fouled" and the red "Hot or Lean"
@albarran9, sorry to have hijacked your thread...
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