Piston rIngs are shot, time for an overhaul.
an oil leak
PCV valve is shot. The oil leaks down the intake snorkle to the filter.
you probably have a little "blowby", where combustion gasses leak past the pistons and into the crankcase. When the gasses escape through the breather, into the air filter, any oil vapor that has been picked up is deposited on the air filter.
If the casing is spilt a filter will leak an incorrectly installed filter will also leak.
old rubber gasket stuck to block or to much oil pressure regulated by spring above oil filter Filter not tight, hole in filter,....
The old oil filter gasket might still be stuck on the engine block. Having the two gaskets in place will not allow the filter to seat correctly causing a leak.
You have a leak and a large one. If you or a cheap store just changed oil, then they may not have attached the Oil Filter or the Oil Pan Plug correctly. If you leave off an O-ring or don't lube the gasket on the oil filter, then it could leak. Generally this will not leak very fast. The oil pan plug is at the bottom of the oil system and it would leak out all of the oil. Check your radiator water. Sometimes an engline will leak oil into the coolant system and it will be carried to your radiator. This will turn the water a chocolate milk color.
No because oil filter i meant for oil to go on the filter air filter does not need oil
This leak can be the block, mount or as simple as the filter assembly seal itself. An easy way to isolate the condition would be changing the oil filter, starting the engine and checking for new leaks.
The filter cap will be brocken and oil can leak through that way just change the filter cap
Headgasket!
The filter may be lose if this is not the case the threads around the filter may be "stripped". Try changing the filter if this does not work I would take your vehichle to a certified mechanic.