I just changed my oil a couple of days ago and I noticed that there was some oil residue coming down the back side of the oil pan(side closest to the firewall). It doesn't seem to be any where else on the oil pan just that side. Would this most likely be a leaky oil pan gasket. I know that the WRX uses a silicone gasket. Does anyone recommend a good brand they have used. Thanks in advance for the input.
2005 Subaru Impreza WRX