What is crankcase oil capacity on an lycoming 0540?

The crankcase oil capacity for a Lycoming O-540 engine is typically around 8 quarts (7.6 liters) with an additional quart allowed for the oil filter, making a total of about 9 quarts (8.5 liters) when including the filter. It's always best to consult the specific aircraft's maintenance manual for exact specifications, as variations can occur based on modifications or specific model designations.