hi, the best way to do it, is to degrease an wash your engine(top/bottom/underneath), (BEFORE YOU ADD WATER- spray all electricals (coils, coolant temp sensor, alternator, battery etc etc) with WD40 or similar, and cover your intake (water+pistons=not good):yeah:!!! after its all nice and clean everyday inspect the engine and look for leaks. that way you will be able to see WHERE it is coming from because it will be fresh oil and not oil mixed in with dirt. also as already said (it may sound realy obvious) but check sump plug and oil filter (normally if the sump plug is leaking it will be the gasket/washer!!! :thumbsup: