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///M3 Forum
The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 05-29-2016, 06:48 PM   #1
asma123
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Orange oil light

Alright so for some reason my m3 sometimes gets the yellow oil light when I turn it off. I know this is due to low oil.
Today when I was driving the yellow oil light came on and it was solid so I figured ok maybe now it's actually pretty low so I stopped right away at the closest oil shop and had it topped up. I checked the dipstick and sure enough it was low. SLIGHTLY. Topped it up with half a quart and was on my way. No light, nothing else.
Could this possibly be because it's so sensitive to being slightly low or because the sensor is on its way out?
On another note I also have another problem that when I turn key over and wait for the lights on the dash to come on I noticed that sometimes the red oil light comes on and sometimes it doesn't. Possibly the same sensor? What do you guys think
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Old 05-29-2016, 06:58 PM   #2
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The sensor will report low when not low at all on its way out. Since you were actually low, then the sensor is still working.
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Old 05-29-2016, 09:09 PM   #3
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Why are you losing oil? You shouldn't have oil lights coming on - and you shouldn't be driving it knowing the your oil is low.
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Old 05-29-2016, 09:52 PM   #4
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Tbh I have no idea why I'm loosing oil. I haven't seen any oil spots on spots that i park on and also I know that if it was low it wouldn't be too low since i had the oil change not too long ago.
On the dipstick the oil was in the middle of low and full so it really isn't that bad.

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Old 05-30-2016, 04:53 AM   #5
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When the oil light came on were you parked on a level spot or on a slope? I replaced my oil sensor last November and have not had an oil light come on until last week when I parked on a slight slope and shut off the car. The oil level was between the notches when I got home and the oil light has not come on again.
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Old 05-30-2016, 01:39 PM   #6
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Tbh I have no idea why I'm loosing oil. I haven't seen any oil spots on spots that i park on and also I know that if it was low it wouldn't be too low since i had the oil change not too long ago.
On the dipstick the oil was in the middle of low and full so it really isn't that bad.
Pull the plastic underbody panel and reinforcement plate, and look for an oil leak. Also look under the hood. If you don't find anything, you may have an internal issue like I do. May want to do a compression and leak down test.
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Old 05-30-2016, 03:21 PM   #7
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Pull the plastic underbody panel and reinforcement plate, and look for an oil leak. Also look under the hood. If you don't find anything, you may have an internal issue like I do. May want to do a compression and leak down test.
Whats wrong with yours internally?
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Old 05-31-2016, 08:27 AM   #8
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Whats wrong with yours internally?
Either mine consumes too much oil, or I have an internal leak. I've been holding off on doing a compression and leak down test for no reason, so no idea what's going on. If head gasket is leaking, I may just replace motor.
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Old 05-31-2016, 08:31 AM   #9
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Also, when driving from Houston to Austin last night, I could smell oil in the cabin every time I would make a stop at a red light. Definitely not CPV, and it's been extremely difficult trying to track down a possible external leak.
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Old 05-31-2016, 06:17 PM   #10
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I am consuming about 0.5 liter per 4K miles. 73K on the car. Oil light seems to be coming on when it needs a liter.
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Old 05-31-2016, 08:15 PM   #11
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I am consuming about 0.5 liter per 4K miles. 73K on the car. Oil light seems to be coming on when it needs a liter.

You're burning a lot of oil. You're going to want to deal with that some day. I'd start with an oil test.
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Old 05-31-2016, 09:20 PM   #12
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where ( in usa ) should I send my sample? I rep Polaris will that do?
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Old 05-31-2016, 09:24 PM   #13
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where ( in usa ) should I send my sample? I rep Polaris will that do?

Blackstone. Request a test kit from their website.

http://www.blackstone-labs.com/
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Old 05-31-2016, 09:54 PM   #14
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Thanks Just changed oil today. Will give it a couple of K then send one in. ( already disposed the old)
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Old 05-31-2016, 11:42 PM   #15
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Thanks Just changed oil today. Will give it a couple of K then send one in. ( already disposed the old)

Definitely put a few K of miles on it. Probably close to your next change interval. Track the miles on that oil.
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