I own a Skoda Octavia Ambiente 1.9 TDI car manufactured in 2002. Yesterday I heard 3 shrill beeps coming from the dash as I was driving. When I got home, I checked the manual to see what the warning sound was, and it said 3 beeps indicate a low oil level warning. But I didn't see the low oil level light on the dash. I checked the oil with the dipstick and it was up to the level, but the viscosity of the oil seemed low. I had the oil changed in the car 3000 miles ago. Should I just consider the beeps a glitch of some kind, or do i need to take further action?