That reminds me of a story.
My folks had a 64 falcon with the 170 straight 6, it never used a drop of oil. My mom called my dad to tell him the light was on. My dad told her to drive it, the sensor must have failed because it never used oil.
Turns out it just ran out of oil. He filled it up and ran it another 50,000 miles.
He was a mechanic.