Right, I've just been under my bonnet checking things and noticed that there's is slight bit of oil sitting on me turbo silencer, i've got a couple of pics which aint the best as i quickly took them with me phone, as you can see there's oil that's coming from where there's a seam, if i wipe it away and take it for a drive and look at it again i see the oil starting to come back........should i be worried?