Hi I have had my filter fitted for about 7-8 months i think, and i took it out last weekend, and it had quite a bit of black engine oil on it, i checked it becasue the car just had a service and i wanted to make sure they didnt' change it, i am thinking maybe they swapped it for someone elses :S has anyone elses got thick black oil around the bottom edge, its not like dripping off, i just didn't expect it to have oil on the outside part of the filter