WHEN OIL LIGHT CAME ON ONLY DROVE 3-4 MILES,STOPPED, CHECKED OIL AND WAS AT THE "ADD" MARK, TOPPED UP, LET IT SIT FOR A FEW HOURS,RESTARTED, STILL HEARD FAINT TAP/KNOCK, AFTER A MINUTE LIGHT CAME BACK ON. SHUT IT DOWN. WHAT DO YOU THINK?
OIL LIGHT CAME ON SLIGHT KNOCK on 1997 Ford Taurus
I would get the oil pressure checked and if it is low, then a check of the oil pump, oil pump pick-up and oil passages will be needed.