How much oil do you put in a craftsman rototiller 5.5hp?

For a Craftsman rototiller with a 5.5 hp engine, you typically need to add about 20 ounces (or 0.6 liters) of engine oil. It's important to use 30-weight oil for warmer climates or 10W-30 for cooler temperatures. Always check the owner's manual for specific recommendations, as oil capacity can vary slightly depending on the model. Make sure to check the oil level with the dipstick before operating.