In dealing w/ venting the crank case (was pressurizing the crankcase) installed a catch can, connected to vacuum port and PCV port; seems to be working (no more pressurization of the crankcase; now have vacuum as there should be). But have had one instance of OBD warning indicating oil pressure low and the occassional (twice) flash of the oil light on the dashboard. Coincidence or something more serious? Checked the oil dipstick and oil level is at the 2nd notch from the bottom of the stick. No apparent oil leaks. Am thinking about just adding a quart of oil and see how things behave. Suggestions?

88 750il Vortech V2SQ 8psi 6-spd