If you are not looking to extend drains but still want premium quality CK-4 diesel engine oil, Monolec Engine Oil provides wear protection and excellent service for engines in mobile equipment and stationary generators. With its formulation of select base oils, shear-stable viscosity improver and Monolec, LE’s exclusive wear-reducing additive, Monolec Engine Oil offers increased fuel efficiency, dependable performance and wear protection. It is available in 15W-40 and 10W-30 SAE grades and is especially formulated for low-emission and ultra low sulfur diesel (ULSD) engines and backward compatible for use in older diesel engines.