Today I was looking at a 2004 Vectra 2.2 Direct with 4800 on the clock. I checked the engine oil level just after the engine had been running and saw that the oil at the end of the dipstick was quite black. Dirtier looking than my 10 year old Cavalier which has done 102000. The salesman said that this was quite normal as it is was the first lot of oil in the engine. Before the car was sold the oil and filter would be changed as part of the Network Q service. Should the oil in a new engine be black ? Your opinions please. Regards. Dave.