Bouncing Oil Level in MMI

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Jul 21, 2016 | 02:04 PM

ad2005

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Bouncing Oil Level in MMI

Not sure how many have noticed this phenomenon.

So here is what I mean by bouncing oil level in MMI.

1. After a drive 10 days ago, I checked oil level and it was at max.
2. Five days ago after a drive it was showing about a 1/3rd below max.
3. Three days ago before drive it was 2/3rd below max. After driving went back up and was 1/3 rd below max.
4. This morning with cold engine the oil level was a hair below max.

2nd and 3rd point I can rationalize and understand. The weird, part is point # 4 above.

I guess some special "Audi Oil Fairy" came in the middle of the night and topped up the oil.

Wonder what is going on here.

The difference between min and max according to dealer is only about 1 liter.

ad2005

Jul 21, 2016 | 03:19 PM

hb1

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Ive noticed the same.

Jul 21, 2016 | 04:08 PM

marnes

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Any correlation of temperature changes or different inclines?

Kind of makes me think of the historic "don't drive up a hill with an empty tank of gas" issue"...

Jul 21, 2016 | 04:15 PM

ad2005

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Quote:

Originally Posted by marnes

Any correlation of temperature changes or different inclines?

Kind of makes me think of the historic "don't drive up a hill with an empty tank of gas" issue"...

Haven't driven it today and right now its a hair above max.

So, elevation hasn't changed at all. It is on flat surface in the garage.

So what the expasion coeff of oil when heated. The outside temp this morning was 70F and right now it is 85F.
So theoretically temp can have an effect and change volume.

Good physics question.

ad2005

Jul 21, 2016 | 04:53 PM

ven7782

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From: Holmdel, NJ

The correct oil level is read early in the morning or few hours after the last drive. Anything in between the drives will show varied oil levels.

Jul 21, 2016 | 05:06 PM

ad2005

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Quote:

Originally Posted by ven7782

The correct oil level is read early in the morning or few hours after the last drive. Anything in between the drives will show varied oil levels.

Ok, then shouldn't the level stay the same in both the cases.
Have checked it in early morning and few hrs after a drive and the levels are different.

Jul 21, 2016 | 05:08 PM

ven7782

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From: Holmdel, NJ

Quote:

Originally Posted by ad2005

Ok, then shouldn't the level stay the same in both the cases.
Have checked it in early morning and few hrs after a drive and the levels are different.

Yes it should stay same, however the level also depends on whether your park surface is flat or tilted. My driveway has a slight tilt towards the right and the oil level always fluctuates.