04-24-2021, 12:55 PM | #1 |
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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.
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04-24-2021, 01:48 PM | #2 |
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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. |
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04-24-2021, 06:10 PM | #3 | |
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04-24-2021, 09:19 PM | #4 |
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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...
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04-24-2021, 10:08 PM | #5 | |
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04-25-2021, 12:38 AM | #6 |
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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! |
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04-25-2021, 02:47 AM | #7 |
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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
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04-25-2021, 08:41 PM | #8 |
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Is your exhaust bluish (burning oil)?
You may have a faulty oil level sensor.
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04-25-2021, 10:04 PM | #9 |
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04-26-2021, 06:27 AM | #10 | |
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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.
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04-26-2021, 12:14 PM | #11 | ||
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04-26-2021, 02:07 PM | #12 | |||
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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/
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04-26-2021, 11:52 PM | #13 | ||||
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04-29-2021, 08:11 AM | #14 |
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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...
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11-25-2021, 05:32 PM | #15 |
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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
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12-14-2021, 07:04 PM | #16 |
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This is weird. Did you ever do a compression or leakdown test?
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12-14-2021, 07:09 PM | #17 |
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