ok ya unless you are seeing blue smoke out the rear of the exhaust pipe at any time then there is just oil that dripped down on the exhaust pipe and or block and if infact you keep smelling this smell just keep checking your oil every other day to make sure whatever bonehead it was that changed your oil, tightened down the drain bolt/oil filter tight enough or if there really dumb they tightened them too far and said oh well its a chick by the time she notices I fucked up it'll be October. so dont freak out and go get a man with some brainpower so you can keep your lude running.