Peugeot 308 S HDi 2009 - Oil Pressure light has come on (over Bank Holiday, joy) only two months after a P1 dealership service. Oil info light on start up says Oil OK. I've looked at the dipstick and it looks OK (I understand from other threads in the this forum, black oil is usual). My question is, should I be asking some tough questions back to the dealership as to why this has happened? And what? Surely if there was an issue with the oil circulation in the engine, this should be picked up at all levels of servicing? I've had my car serviced at this dealership since new, so would be dreadfully disappointed if they missed something.