Available in SAE 10W40, 20W50, SAE 50, and SAE 60. SAE 20W50 - 4 Litre. Harley-Davidson® 4 Litres 20W-50 Engine Oil. Be assured, H-D 360 Oil can be trusted in a Harley-Davidson engine. Harley-Davidson Genuine H-D 360 Motorcycle Oil is developed and tested for use in Harley-Davidson motorcycles.