dingle2001uk

Hi everyone, I have a 330ci 53 reg facelift model with 133,000 on the clock, full bmw service history, but recently after about 5 or 6 miles of driving, i slow down for traffic or lights i get a smell of burning oil. There is no sign of oil dripping on to the drive, and i've got the engine up to temp on the drive to see if the rocker cover gasket is leaking, but no sign of it, any ideas would be gratefully recieved