(3.3 l) with filter Motorcycles Cruiser DX051579846816690015315 DX1 . So when we built the Softail Slim? S we loaded it up with the most powerful engine you can get in a cruiser. Engine: - Oil Capacity: 3.5 qt. 2017 Harley-Davidson Softail Slim? S FLSS Softail Slim S Nothing gets more respect on the street than power...