only on the passenger side and there is oil seen around the front main seal. There is no evidence of any oil foward of this and no evidence of any oil leak from the valve cover or around the turbos. The air flow from the fan seems to be blowing the oil back around the oil pan, oil filter, etc. I guess I could pull off one of the timing belt covers to take a look in there to see if there is any oil up there. I remember Silvertwin (OH) telling me once that the main seals (front or rear) are more likely to develop a leak on a car that is not driven much so I have that is one of the reasons that I am leaning in this direction.