Cool, cheers guys. I'm starting to think it may be a pump problem, is there anything that can be done about this? I'm still trying to track down a persistant leak, still dropping significant amounts of oil but I'm having a lot of trouble finding the cause. I'm guessing this is related to the pressure problem but...? Whereabouts is the oil-pump located? Is there a gasket between it and the block that could be having problems? I've never had oil problems before so I've never had to investigate that side of things much so sorry if my questions are a little ignorant. Oh, and just in case they're not readily apparant, what do these plugs look like? - (I'll probably be able to recognise them but just in case (and to save time)Cheers, Chris.