I have a 03 and noticed that there is what looks like oil down the driver side rear of my engine. Last year I made a thread about seeing oil around the valve cover area and some people replied that some of the early models had problems with the seal on the valve cover leaking. Im wondering if this oil could be from the same seal? I have 55,000 mi. Would this kind of thing be covered under the engine warranty? Should I worry about it or just drive?