Oil catch can engine problems

[Alpine_F82]

Hey so I just installed the oil catch can because I have been replacing the oil and within 1000miles it says Add a quart of oil, so I changed the oil level sensor and the problem persisted, so I installed the bms oil catch can 3 days ago and just checked it today after 140miles if driving it looks like it has a lot of oil/fluid in there for 140miles or driving. I'm thinking the PCV system needs to be replaced? What should I do, I notice, After a couple near redline pulls the car throws a oil light everytime add 1 quart I thought it was crazy but I guess I'm dumping 1quart when I go racing.

[JamesGames]

That's not normal if it's only 140 miles.. what oil are you using and are you tuned ?

I have been running the BMS oil catch can and check every 2-5k miles. So far I've never been able to pour anything out, only light residue that can be wiped off, however I'm stock tune for 5+ years now.

[Alpine_F82]

Originally Posted by JamesGames

That's not normal if it's only 140 miles.. what oil are you using and are you tuned ?

I have been running the BMS oil catch can and check every 2-5k miles. So far I've never been able to pour anything out, only light residue that can be wiped off, however I'm stock tune for 5+ years now.

Yes I'm stock Besides for k&n drop ins and MPE exhaust. I used the 0w-40 bmw oil that all the M3's and M4's have in The manual outside the United States, but switched back to 5w-30 when I took the tune off. used to have a jb stage 1 on it but took it off and went back to stock I only had it on 8k miles.

[TopJimmy]

If you are a quart low frequently then you're burning oil or leaking somewhere. The oil catch can is for catching oil/water vapor that blows by your rings. What's in your can looks normal. The amount can vary by location. I've noticed running higher ethanol content definitely fills it faster.

Check your OCC frequently and dump it, but you really need to find out where your engine oil is going...

[Alpine_F82]

Originally Posted by TopJimmy

If you are a quart low frequently then you're burning oil or leaking somewhere. The oil catch can is for catching oil/water vapor that blows by your rings. What's in your can looks normal. The amount can vary by location. I've noticed running higher ethanol content definitely fills it faster.

Check your OCC frequently and dump it, but you really need to find out where your engine oil is going...

But I just installed the catch can 3 days ago about every 1kmiles it says I need a quart of oil. So it looks like it's going into the occ imo but we'll see over time I guess. I drive my car hard though I don't push it near redline a lot only when racing I tend to keep it under 6000-6500 at most but do a lot of mountain runs and it has 70k miles now it's gotten worse with time it used to be about 1kmiles before oil change then 3-4K miles before oil change now it's every 1k miles. But engine runs fine and no codes in reader or problems with engine make no since lol. Any insight on what it could be?

[BzsBimmer]

I agree with TJ. Sounds like you’re burning oil if you’re needing to top off every 1K miles.

If you think your catch can will hold a liter of oil, you must have a massive catch can!

[Alpine_F82]

Originally Posted by BzsBimmer

I agree with TJ. Sounds like you're burning oil if you're needing to top off every 1K miles.

If you think your catch can will hold a liter of oil, you must have a massive catch can!

Nah, like I said I installed it 3 days ago, before this it has been going back into the engine. So 3 days for that type of fluid to be there is insane to me. I didn't go through a liter of oil in 3 days but in 1000k miles and I drove 140 miles over the past 3 days. So that's around 7.1 times the amount that is currently in there if at 1000miles. But idk

[F32Fleet]

Is your exhaust bluish (burning oil)?

You may have a faulty oil level sensor.

[Alpine_F82]

Originally Posted by F32Fleet

Is your exhaust bluish (burning oil)?

You may have a faulty oil level sensor.

No and also I changed the oil level sensor thinking that may be the problem but it wasn't

[F32Fleet]

Originally Posted by Alpine_F82

No and also I changed the oil level sensor thinking that may be the problem but it wasn't

You very easily could burn 1 QT while racing. That's not unheard of.

So let's omit possible causes

Bluish smoke / oily exhaust tip - No
Faulty oil sensor - No
Oil in coolant - No
Oil in wiring harness leading to the sensor?
Oil leaki accumulating on the underbody tray?

Unfortunately burning 1QT/1k miles is per german automakers not considered excessive.

[Alpine_F82]

Originally Posted by F32Fleet

You very easily could burn 1 QT while racing. That's not unheard of.

So let's omit possible causes

Bluish smoke / oily exhaust tip - No
Faulty oil sensor - No
Oil in coolant - No
Oil in wiring harness leading to the sensor?
Oil leaki accumulating on the underbody tray?

Unfortunately burning 1QT/1k miles is per german automakers not considered excessive.

There is nothing in underbody tray I did notice one turbo is leaking oil through the seal tho but not much, besides for that it's dry. I just don't see 3 roll races going through, it burning 1 liter of oil. Engine temp is always fine too. I don't understand it, I always do the maintenance on it too since warranty ran out. If I drive it normal it would last 1kmiles if I Immediately fill it up and do a race 3-4 roll races it needs a liter of oil. I mean it's gotten worse over time it used to be 5-8k miles for 1 liter of oil depending on how I drove it. But now it's bad, but no codes or any engine problems, I filled it up with 3 liters over maybe a 3-4 week period and dumped it because I thought I might be over filling it and sensor was bad but when I dumped it it was 1 liter short. So it's definitely not a electrical issue, it's a engine issue imo

[F32Fleet]

Originally Posted by Alpine_F82

There is nothing in underbody tray I did notice one turbo is leaking oil through the seal tho but not much, besides for that it's dry. I just don't see 3 roll races going through, it burning 1 liter of oil. Engine temp is always fine too. I don't understand it, I always do the maintenance on it too since warranty ran out. If I drive it normal it would last 1kmiles if I Immediately fill it up and do a race 3-4 roll races it needs a liter of oil. I mean it's gotten worse over time it used to be 5-8k miles for 1 liter of oil depending on how I drove it. But now it's bad, but no codes or any engine problems, I filled it up with 3 liters over maybe a 3-4 week period and dumped it because I thought I might be over filling it and sensor was bad but when I dumped it it was 1 liter short. So it's definitely not a electrical issue, it's a engine issue imo

Sorry when you said racing I thought you meant tracking.

Have your tried a 5w30 OR a 5w40?
BMW upgraded the LL01 specification in 2018 and 0w40 can't meet the new oxidation requirement.

I suppose you could do a leak down test just to see how much blow-by you're getting. As I said the oil is going somewhere.

You could also ask a BMW technician. He'll answer you within a day.

https://bmwtechnician.com/

[Alpine_F82]

Originally Posted by F32Fleet

Sorry when you said racing I thought you meant tracking.

Have your tried a 5w30 OR a 5w40?
BMW upgraded the LL01 specification in 2018 and 0w40 can't meet the new oxidation requirement.

I suppose you could do a leak down test just to see how much blow-by you're getting. As I said the oil is going somewhere.

You could also ask a BMW technician. He'll answer you within a day.

https://bmwtechnician.com/

Well I do both, just not in the past year or so, I don't really consider roll racing... racing anyways lol. I may be bringing it to a shop to get a test done

[TopJimmy]

Maybe the oil cooler has a nick in it? If so you would only leak when the oil thermostat opens, which is while driving. Just a maybe...

[Alpine_F82]

Update: when I took jb stage 1 off it went back to normal which was like 1 liter per oil change and also near the oil change. I switched to BM3 stage 1 with transmission GTS and have had no problems for a whole oil change and also near none in the oil catch can. So idk if the jb stage 1 regulates it Differently or not I know it's just a piggyback so that I assume was the problem

[papasmurf_m3]

This is weird. Did you ever do a compression or leakdown test?

[Alpine_F82]

Originally Posted by papasmurf_m3

This is weird. Did you ever do a compression or leakdown test?

Dealer did, everything was normal