I've got a 1997 Pug 306 1.4 Style and have noticed a small amount of Oil appearing on the underside of the engine. It can't be leaking a lot as it doesn't appear to be affecting the engines oil level, when checking by dipstick. It's just passed the 57'000 mile mark. I wondered from anyones experience what this is likely to be? Gaskets, oil seals...? Cheers.