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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > Mechanical Maintenance and TSBs: Break-in / Oil & Fluids / Servicing / TSBs and Service Bulletin > F31 318d 2015 drinking oil
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      05-14-2019, 11:25 PM   #23
328dX
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Originally Posted by Danderlion View Post
UPDATE:

I got to the dealership and they drained the engine oil, filled it up (normal bmw twinpower 0-W30), change filter and gave me a spare liter and sent me driving. 1000km to be precise. In that drive the car asked for 1L of more oil and is now sitting at 3/4 meter so it drank 1.25Lish on that 1000km drive. I am now waiting for them to take it in and drain the oil again and see exactly how much is missing.

Things I noticed while doing this 1000km in 3 days drive was that there is no smoke coming out, no noticeable oil leaks (was parked on a white painted garage floor the whole time when standing still over night etc) and it seems to loose power for just a few milliseconds when cruising on the highway. What I mean with that is that it is fast and snappy when actively driving, accelerating, braking, changing gears etc... but after a few minutes after being driving a bit harder and you are now cruising at 120km/h it just very briefly looses power and then reengages. I can best describe it as if you're walking down the street and stumble. That's basically how it feels.

Any wild random ideas what might be going on? The company I bought the car from should be covering repairs but even they have started getting a bit nervous when checking on the progress and started hinting at maybe it would be better for them to replace the car with another from their selection.
I am mostly curious what could be going on as I can't find and similar cases online that would fit with no smoke, no leak and drinking oil and what might the possible costs be to troubleshoot and fix?
Not leaking is odd, not smoking is odd, but with that much oil lost it is definitely an internal issue. I doubt the piston rings/bore is worn unless it was purposely neglected. It has to be a valvetrain issue/turbo issue etc.
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      05-15-2019, 02:39 AM   #24
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Originally Posted by 328dX View Post
Not leaking is odd, not smoking is odd, but with that much oil lost it is definitely an internal issue. I doubt the piston rings/bore is worn unless it was purposely neglected. It has to be a valvetrain issue/turbo issue etc.
Yeah I was suspecting something internal also just wasn't sure what could make that much oil vanish without any obvious traces, neither of what you suggested sounds like cheap fixes so lets see. I got time to finish the test on Monday next week. That might shed some light.
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      05-16-2019, 12:58 AM   #25
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Yeah I was suspecting something internal also just wasn't sure what could make that much oil vanish without any obvious traces, neither of what you suggested sounds like cheap fixes so lets see. I got time to finish the test on Monday next week. That might shed some light.
I feel like its going to end up being an easy fix OP.

If not the last owner must've gone way over on his oil change intervals
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      05-16-2019, 01:54 AM   #26
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I feel like its going to end up being an easy fix OP.

If not the last owner must've gone way over on his oil change intervals
Thanks, let's hope so.

I will check the digital service book again once I get back from work but I would like to remember it was meticulously serviced which made the huge oil consumption seem so out of place.
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      05-20-2019, 06:56 AM   #27
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So I heard back from the bmw dealership. The car doesn't have a low oil error logged so they can't prove that I needed to add 1L during my 1000km drive which leave consumption at 0.5L per 1000km meaning the car actually consumed 1.5L for a 1000km drive. They admit that someone has been doing changes to the car (coding it), they could see it was months before I bought it, but the burden of proof is still on my shoulders.

I am starting to get to my whits end. They told my clearly that this problem will not go away, it will get worse but it's not bad enough to warranty a fix on the purchase deal and by the time it is bad enough to fix it will most likely be 6-12 month after purchase and not reasonable to assume they would fix it.

Their best suggestion is that I just go aimlessly driving around until the "low oil" comes on and instantly get back to them so they can see it.

If anyone has any ideas I would be very happy because this is starting to look like I need to start saving for a engine change in a few months.
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      05-22-2019, 12:27 PM   #28
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So it seems that finally I get mechanics to see the error and it seems the car doesn't save errors in the ECU anymore. official consumption now estimated to 1.3-1.5l per 1000km by dealership.
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