High-performance motor oil with synthetic additives specially adapted to maritime use. Even under extreme operating conditions, it provides for a stable lubricating film. Keeps engine seals, such as shaft sealing rings and valve stem seals flexible and minimizes oil consumption. Meets leading engine manufacturers' requirements. Fulfills warranty cover provided by manufacturers who require NMMA FC-W Catalyst Compatible® approval. Tested for use with catalytic converters and turbochargers.