[bmwuser111]

.

[tlow98]

Have you checked your PCV again? Seems like the best place to start.

Make sure the drain for the system (back into the block) isn't clogged, as well.

[tlow98]

Originally Posted by arenclements

Is there some way to check that the PCV is working correctly? I replace the original one since I noticed oil in the intake manifold.

Take it apart, again.

[07lilredwagon]

you should be able to open the oil fill cap on the valve cover without it feeling like its sucking it back in....a little vacuum is normal...

also, if you hear a whistling coming from the motor, it may be the ccv system acting up.

you can have a compression test done to be sure it is not in need of new piston rings....but I would just check the plugs first, they should look normal.

JP

[STR8-6IX]

what oil and weight are you using? try liqui moly, motul, amsoil or shell rotella 5w40 oil. this will help slow oil consumption.

[doru]

Maybe check these pics from this post.
The OP shows a shot of a clogged hose, and I think it's related to that CCV. If you still have the manifold off, maybe check all those CCV related hoses and connectors to make sure they aren't clogged. You could try shoot some air through them (if you have a compressor). Not sure about the CCV, but I think it's a one way flow. Again, with all the stuff out, see if it works as intended.

[hassmaschine]

I doubt it's rings (blowby that severe would lead to seriously reduced power). It could be valve seals, but I doubt it at 80k. I'd bet there's still something wrong with the oil separator. Did you replace the hoses too? They can get all gunked up. Another potential problem could be the passages inside the valve cover.

Does it blow blue smoke? If you pull a spark plug, is it wet with oil?

BMW might say 1 quart in 3k is "normal" but I have two N52 cars and both use less than 1 quart in 10k miles.

Originally Posted by STR8-6IX

what oil and weight are you using? try liqui moly, motul, amsoil or shell rotella 5w40 oil. this will help slow oil consumption.

stop. Just fricken' stop.

[PhaseP]

Originally Posted by arenclements

. Tomorrow I will be buying a new oil separator since I checked all the hoses and none are broken nor clogged. Has anyone had an experience with an oil separator failing a few months after replacement?

Did you check/replace the hose that goes down to the oil pan from the bottom of the oil separator?

That hose also has a ball operated check valve at its bottom bend.
It could also have been clogged making the check valve not operating.
If you remove that hose and shake it, you should hear the ball rattling at that bottom bend. Also if you blow on it from bottom side the valve should close and not allow you block.

I would spray some electrical cleaner from the bottom side of it to make sure the check valve is area is clean and operating.

If full vacuum reaches that hose by the oil separator not functioning correctly and check valve is also not operating, the vacuum will pull engine oil from oil pan into intake manifold.

Also if you had some sludge/crud in engine it may have found its way into the newly installed oil separator and deposited at the oil separator membrane valve closing area. This would prevent the oil separator to close fully when needed (under high vacuum), and let oil into manifold.

Unfortunately the membrane valve of the oil separator is not serviceable unless you do some plastic surgery and buy replacement from Ebay or Russian provider.

[STR8-6IX]

Originally Posted by hassmaschine

I doubt it's rings (blowby that severe would lead to seriously reduced power). It could be valve seals, but I doubt it at 80k. I'd bet there's still something wrong with the oil separator. Did you replace the hoses too? They can get all gunked up. Another potential problem could be the passages inside the valve cover.

Does it blow blue smoke? If you pull a spark plug, is it wet with oil?

BMW might say 1 quart in 3k is "normal" but I have two N52 cars and both use less than 1 quart in 10k miles.



stop. Just fricken' stop.

i posted this a while ago?

you cant deny that a thicker oil wouldnt help oil consumption.

[tlow98]

Originally Posted by STR8-6IX

i posted this a while ago?

you cant deny that a thicker oil wouldnt help oil consumption.

We're trying to help OP get to the root of the problem and you're just here saying what you say in every thread, whether it's useful or not.

So what if you said this a while ago? You spread so much nonsense around here 24 hours a day, it's literally impossible to extinguish your crap at a reasonable rate.

We'll try harder.

[gunnerxq]

Originally Posted by hassmaschine

I doubt it's rings (blowby that severe would lead to seriously reduced power). It could be valve seals, but I doubt it at 80k. I'd bet there's still something wrong with the oil separator. Did you replace the hoses too? They can get all gunked up. Another potential problem could be the passages inside the valve cover.

Does it blow blue smoke? If you pull a spark plug, is it wet with oil?

BMW might say 1 quart in 3k is "normal" but I have two N52 cars and both use less than 1 quart in 10k miles.



stop. Just fricken' stop.

Yeah the different oils are a valid point...fastest oil consumption ever on my car was Pennzoil Platinum it was a quart every <400 miles. Slowest were valvoline syn power and liqui moly 5w30. Last oil I had in my car was Castrol full synthetic 5w-30. That was a quart every 500-600 miles.

Now I just put in Liqui moly 5w-40. It's been almost 300 miles and nothing was eaten yet. Might win it's way to longest lasting oil how it's looking so far.

I think it's a combination of leakage and oil burn-off. Some might burn off really fast if you regularly keep your car above 3,000 rpm.

[gunnerxq]

Originally Posted by tlow98

We're trying to help OP get to the root of the problem and you're just here saying what you say in every thread, whether it's useful or not.

So what if you said this a while ago? You spread so much nonsense around here 24 hours a day, it's literally impossible to extinguish your crap at a reasonable rate.

We'll try harder.

Ehh he has a point with different oils. Even oils with the same weight aren't equal. See my post in this thread.

[hassmaschine]

0w40 and 5w40 isn't going to make any difference in oil consumption - because that is only relevant when the engine is cold, as soon as it's heated up they are exactly the same.

It's not helpful at all, and again, he doesn't even understand the difference himself.

now, a 5w30 vs a 5w40, yeah that could make a difference - but that's not what he said.

[GoRomeo]

interesting... thanks for sharing. I know my issue is not consumption but a leak. I put a quarter every 2-3 months as I often check my oil level on the dashboard. i should also check pcv valve like "doru member shows on his link. Wondering how dirty mine is...

[STR8-6IX]

Originally Posted by hassmaschine

0w40 and 5w40 isn't going to make any difference in oil consumption - because that is only relevant when the engine is cold, as soon as it's heated up they are exactly the same.

It's not helpful at all, and again, he doesn't even understand the difference himself.

now, a 5w30 vs a 5w40, yeah that could make a difference - but that's not what he said.

I'll put money on the fact 0w will burn at a quicker rate.

[terryd5150]

There may be subtle differences in oil properties among different weights, but read the OP's post again.

He's suffering dramatic oil loss. That type of loss isn't indicative of the minute differences in oil weight or brand, it's a clear indication of a physical problem with the system.

[hassmaschine]

Originally Posted by STR8-6IX

I'll put money on the fact 0w will burn at a quicker rate.

You're an idiot.

[justpete]

Originally Posted by STR8-6IX

I'll put money on the fact 0w will burn at a quicker rate.

Four out of five voices in my head will put money on the fact 0w will burn at a quicker rate.

FIFY

Forgot to add the obligatory

[07lilredwagon]

ease a bit on the hate.....everybody has a right to an opinion...and thats all it is...just an opinion. The general consensus of the post is headed in the right direction anyway....

I hope you get to the bottom of this.

Would a leak down test show if a valve guide and or piston ring were failing?

Is all of your timing gear intact?....(you would probably be getting a code if it werent)

You said the plugs had oil on them...and Im assuming you meant the spark emitting end, right?

JP

[tlow98]

Originally Posted by 07lilredwagon

ease a bit on the hate.....everybody has a right to an opinion...and thats all it is...just an opinion. The general consensus of the post is headed in the right direction anyway....

I hope you get to the bottom of this.

Would a leak down test show if a valve guide and or piston ring were failing?

Is all of your timing gear intact?....(you would probably be getting a code if it werent)

You said the plugs had oil on them...and Im assuming you meant the spark emitting end, right?

JP

Yes, everyone can voice an opinion, but when its wrong and people give incorrect advice that could actually impact other's cars in a negative way... That needs to be corrected.

Str8-JiZ is helping no one with his banter.

Appreciate you bringing to light actual questions and ideas in your post, tho!

[STR8-6IX]

Originally Posted by justpete

Four out of five voices in my head will put money on the fact 0w will burn at a quicker rate.

FIFY

Forgot to add the obligatory

Originally Posted by 07lilredwagon

ease a bit on the hate.....everybody has a right to an opinion...and thats all it is...just an opinion. The general consensus of the post is headed in the right direction anyway....

I hope you get to the bottom of this.

Would a leak down test show if a valve guide and or piston ring were failing?

Is all of your timing gear intact?....(you would probably be getting a code if it werent)

You said the plugs had oil on them...and Im assuming you meant the spark emitting end, right?

JP

look at this nonsense. a fully grown man unable to contain his disrespectful ideas and chooses to insult those with conflicting opinions instead. brings absolutely no theories or proof to his rebuttal, just insults. justpete. are you 13 years old?

e90 post is a knowledgeable, helpful section of the forum but this general arrogance and disrespect is absolutely ridiculous. Justpete, I have a conflicting opinion. get a grip with yourself. do you just have to act like a 13 year old twat everywhere you go?

[tlow98]

Originally Posted by STR8-6IX

look at this nonsense. a fully grown man unable to contain his disrespectful ideas and chooses to insult those with conflicting opinions instead. brings absolutely no theories or proof to his rebuttal, just insults. justpete. are you 13 years old?

e90 post is a knowledgeable, helpful section of the forum but this general arrogance and disrespect is absolutely ridiculous. Justpete, I have a conflicting opinion. get a grip with yourself. do you just have to act like a 13 year old twat everywhere you go?

Justpete is doing the forum a favor. You're not.

Sometimes you have to cull the herd.

Go away.