Can Anyone Help I On My 1992 3.9 Range Rover When You Start It Up From Cold The Oil Light Takes Ages Too Go Out When Its Warm Its Fine I Have Just Done A Oil And Filter Change And Also Fitted A New Pressure Switch But Its Still The Same I Have Got A Set If Gears And A New Cover That I Was Going To Have Fitted When I Take The Car In To Have The Velet Gasket Done At The Same Time I Was Going To Have New Tappets Pushrods And Complete Rocker Shafts Replaced As It Some Time Has A Noisey Tappet When Cold Aswell