Hello everyone !! Just been driving today around LONDON, very slowly traffic, "typical London" and recently I had my car serviced with oil change and oil filter.... "quantum oil", and I have this problem when driving slow with oil pressure warning light showing in dashboard!! When driving over 50 mph its gone! Any ideas what should I check?? Currently driving a4 b7 2.0TFSI quattro s-line special edition BUL engine. 123000 miles on board.