depending on what type of car you have really, but the sump plug is normally underneath your engine. just behind your oil fliter. when you take it off you will need to buy a copper washer (halfords or any other car place should sell them) they cost no more than a pound. once the oil has drained place the washer back over the nut and tighten away. the copper washer will crush and create a new seal to prevent leaking.
baz, December 2004
