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I'm not an authority on this, but the way my b8 s5 shows oil really threw me!

It seems the oil measure in the mmi monitors the top 1ltr of oil.
What I mean by this is that say your car needs 7ltrs, it will show max at 7ltrs and min at 6ltrs.

This confused me cos I got to a point where mine showed "min" on the gauge but with the message "refill 1ltr max". What I now understand this to mean is "put in 1 ltr you're a bit low".

How I know this is that the first time this happened I panicked as I saw "min" googled how much the car needed to be full and tried to put several litres back in. It then said I was over max (I'd added about 1.5-2litres).

Yours is newer so maybe it's different but hopefully the info helps.
 

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As a side point, because I was confused and googled it, people said get a dipstick. I thought great, got one and replaced the plug with.

However for me, that then meant the auto / mmi reading never showed me anything. So I have the dipstick but haven't replaced the tiny plug thing for day to day use.
 
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