Here's how it goes. I noticed a few oil drops under the car. I thought "I will check it later, it doesn't seem too bad I guess". I drove the car like that for a day. On the next morning I noticed the drops are getting noticeable and frequent. The previous day I had to wait to see an actual drop. I had to do my work so I left the car as it is and took my other car. A few days after that I went to the car and saw a big oil stain under the car. I started the car just to leave the engine to work for a while so the battery won't die for just sitting around. The low oil light was not on so I thought "its still ok"

After 2-3 mins the normal engine noise turned into kinda loud rattle and instantly figured out why that happened - it was low on oil. I turned off the engine. I had to go to work so couldn't check it out. Today I was free and went to check the car. The oil stick or whatever its called (sorry I am not native english speaker) was dry I may say - so there's no more oil in the engine, everything was under the car. It seems the top of the engine is fine, it looks clean. I can see the drop on the back on the engine, its covering the transmission. What can it be? I thought its punctured oil pan but apparently it isn't. The oil is coming from the above but I don't know where from exactly

If you can just give me some examples what can be leaking? The only thing that comes to my mind is the crankshaft
