Dear Folks,
          I am experiencing the oil pressure light coming on in a 1986 Synro.
Sometimes it comes on and buzzes  after running for 15 to 20 minutes. And
sometimes not.Sometimes the light will buzz for a few minutes then goes out
maybe, maybe not. Sometimes the light will not come on after driving it for a
couple of hours. There are NO unusual motor noises (such as clatters from
lifters ) or knocks for rods/crank clearances.Could this be a simple oil
pressure sending unit failure???? Please help. Any body experienced this ???

Bill Webster
Meridian,MS.