2016 Harley-Davidson Softail Slim? S LETS RIDE Nothing gets more respect on the street than power. (3.3 l) Motorcycles Cruiser DX42167654023095201245944 DX1 . Engine: - Oil Capacity: 3.5 qt. So when we built the new Softail Slim? S we loaded it up with the most powerful engine you can get in cruiser this year...