bought a 2002 530i, standard with 20k in 2005. Check engine oil light comes on every 600-700 miles, at which time I have to add a quart of oil(5w-30 synthetic). The dealer I bought the car from said this amount of oil consumption was unusual, but could find nothing wrong with the car after extensive testing. Another dealer says according to BMW, this was within the threshold for this car. Anyone having as severe a problem as this? Any suggestions?