My 1991 VANAGON with 84,000 on the clock has been struck with the oil
buzzer/light malady.

      I have replaced the Fram filter with a Mann filter and replaced both
pressure sensors. The problem remains, ie. after about 30 minutes of driving
I wll get the ligth and buzzer at highway speed. Sometimes it will stay on
until the engine is shut off; other times it will stay on for only a few
seconds. Occasionally I can get it to go off for a few seconds by switching
on or off the high beam lights.

       My mechanic and I are frustrated. Any ideas on what is going on ?

                              JIseman457@aol.com