i've got an oil pressure issue with mine ( zetec ) - having tried to adjust the pressure relief valve hoping that someone on here is running one so can pick their brains....basically wanted to double check how much movement needed on the screw that controls the relief......clutching at straws cos having screwed the thing in about as far as it'll go with no change to the pressure gauge am wondering if i#'m missing something.....so if anyone does have any experience grateful for a quick chat - so pls pm me a contact number - chrs mark