John Deere Original Equipment 5 Gallon Engine Oil Torq-Gard™ II, SAE 10W-30 - TY27956. SUB FOR TY26797 John Deere Torq-Gard™ II engine oil meets API CK-4 performance level requirements for modern diesel engines and is backward compatible for older diesel engines. Up to 250 Hours of performance and protection, including engines with low emission devices. This is a OEM John Deere Part.