One whole week into my ownership of a 2007 4S I must admit to being perplexed! I received the car following a full service and the oil gauge showing full. I checked it this morning with the car on a completely flat surface and the gauge showed a segment down, which I understand represents 0.4 litres. Having only done about 250 easy miles I was slightly worried. On checking it 20 minutes later, again on a flat surface following a five mile run, the gauge was showing full. Is that normal? I had run the car for about five minutes before starting the journey. Any advice would be appreciated.