I do have a bit of an oil leak(like any other RR) but only while driving, it doesn't drip overnight or anything, you can just see the bottom of the oil pan with the fan blowing the oil back while driving. The annoying part is whenever I roll the windows down, is when I can smell that oil? What is it most likely, im pretty sure theres some head gasket leaks but anything else that would make it smell when windows are down. Id rather have oil than coolant leaks any day but the smell bother me. BTW, this is an external head gasket leak if it is leaking from there which it prob id. I have 120k miles on my RR