Oil Drop Cataract My Oil Drop Gradually In My BMW 316i I Have Top It Up But Still Its Dropping. What Is The Problem?

My oil drop gradually in my BMW 316i i have top it up but still its dropping. What is the problem? - oil drop cataract

I have the oil and filling in the full four days, I saw the case of oil, slightly below the maximum value and slowly back down from there. Can there be a problem with my engine, or what? Please help me.