Lucas Synthetic SAE 10W-40 Outboard Engine Oil is formulated especially for the harsh conditions of high speed water crafts. Excellent for use with supercharged, turbocharged, or nitrous-oxide high performance engines, this oil is catalyst-compatible and designed for 4-stroke applications but also works well in inboards and PWCs. Long-lasting oil safely blends with synthetic and non-synthetic oils. Fortified with a special blend of synthetic additives that coat all moving parts to guard against rust and moisture during long periods of storage. NMMA certified to meet or exceed FC-W (CAT) performance. Meets JASO MA standards for air-cooled motorcycles and ATVs and industry standards API SM for automobiles.