[ngoma]

Welcome to the forum!

That is quite a lot of oil so it should be easy to find the source. Clean well the engine and after a short drive you should be able to see evidence of the leak. Sometimes it can be more difficult to pinpoint the exact source; remember that externally leaking oil drips downward from the source, sometimes at the front of the engine it can also stream rearwards due to incoming air currents from the front.