Put on a gauge as recommended. You should have a gauge anyway. Sender must match gauge or match light.
From Jim Carter web site: May or may not apply to your engine.
"If you ever removed an oil pan from a 50 year old engine that has been setting, chances are good there can be up to 1/4 inch of sludge in the bottom. This is not a bad thing! The non detergent oil has allowed the dirt to settle. As most 60 year old engines did not have an oil filter, this dirt settling was what should happen to increase the engine life.
The problem begins when a new owner wants to get his old vehicle running. He installs plugs, points, back-flushes the cooling system and changes oil. Oops, he probably adds detergent motor oil! The dirt deposits now begin to slowly go back into suspension. Unfortunately with no oil filter the dirt stays in the oil and shortens the remaining life of the engine."
Non-detergent used until mid 60's!!! As a kid, I always asked for non detergent in my old non filtered cars. I never new why my dad told me to, didn't care.
