Diesel Oils Delo® SHP Delo® SHP lubricants are high-performance diesel engine oils for medium- and high-speed trunk piston diesel engines with or without oil purifiers. Delo SHP lubricants are blended with highly refined base oils and carefully selected additives. Delo SHP lubricants have very good viscosity control when used in severe high-temperature service, and their BN retention characteristics help to prevent corrosive wear over long periods of operation. Ursa® Marine Description coming soon. Ursa® Marine 15W-40 Ursa® Marine 15W-40 is a high-quality, heavy-duty diesel crankcase lubricant. Manufactured from high-quality base oils and compounded with additives, Ursa Marine 15W-40 provides outstanding lubrication of turbo-charged, high-speed diesel engines under severe operating conditions. It contains detergent/dispersant, antioxidation and anti-wear additives. Ursa Marine 15W-40 meets the API service classification CI-4.