... my idle is about 800-900 rpm. (79 RS) The oil pressure light comes on at every stop. When I give her some throttle it disappears. If I set the idle above 1000, no red idiot light. I must admit though, that I prefer a low idle but I don't like the drop in pressure. Do all Bimmers do this? Perhaps a faulty OP switch? What does the forum recommend for an idle speed?