Old engine oil

Have you had another 5L canister Castrol Edge 0W20 VW 50800 in the basement, here was an inspection in January 2021, and we took about 4.5 litres. Half a litre in it, would want to refill something, but: is the oil still good? The tips in the net that the oil should be clear and not cloudy are always mega horny. Who fills the oil from the container in a clear container to check this out? In the oil container itself can’t see that. Half a litre doesn’t make the cabbage fat, but would like to know. New thread, because in the present just another topic