Hi, having been working on my brakes for the last week or so the cars been outta action. When I took it out on the road yesterday for a spin the oil warning light was coming on! Weired as I topped it up a fewe weeks ago and it was over half full on the dipstick. I put another ltr in this moring and the light is still flickering. How much damage would it do to the enigne running the car as it is with the warning light on?