What engine oil type and capacity does this tractor require?

Use SAE 30 oil (above 32°F) or SAE 5W-30 (below 32°F), rated with API service classification SG-SL. The oil capacity is 4.0 pints with the filter and 3.75 pints without the filter. Change the oil after every 50 hours of operation or at least once a year, and check the oil level before starting the engine and after each 8 hours of operation. (Pages 6, 18)