Around 8 days ago, my Seat was serviced: the air and oil filters were replaced, as well as spark plugs and its wiring. Once the oil was changed for Mobil oil 5W-30, and not more than 5 minutes after I started driving, the oil warning appeared on the dashboard. I turned off the car immediately and checked the oil level, which was perfect. I decided to change the oil pressure sensor but the alert kept turning on. Today, I removed the oil and a fluid to clean the engine was added. After that, it was filled with the same oil 5W30 because the mechanic said it is the one this cars take. However, the engine oil warning indicator is still there. What can I do? Hope you can help me and thanks.