I just did an oil change maybe 500km ago and my oil indicator on the cluster came on with the last bar flashing. I checked the dip stick and it barely shows a oil reading. I used mobil 1 0-40 but I only put in 7 liters because the store only had that much. But still even with that I had a oil level reading at atleast 75% and barley a gas tank later I'm empty. What's going on? I park my car in the garage and never seen it drip oil...