1976 Cadillac Deville Oil Change.... but what's that clicking noise?

" It hasnt driven since, so that oil is perfectly fine "

[@infinity3jif]

I don't think they had 5w30 back in 1976🤨

[@Veikra]

it would run fine on molasse and maple syrup anyways

[@marcusleatherwood1582]

So what was the clicking noise