Genuine JCB 40012805I Optimum Performance 15W40 Engine Oil, supplied in a 20-liter container. This high-performance, heavy-duty diesel engine oil is engineered to deliver excellent protection and performance for a wide range of diesel engines, including those equipped with exhaust gas recirculation (EGR) systems. Formulated with advanced additive technology, it ensures superior engine cleanliness, wear protection, and supports extended drain intervals. Meets API CI-4/SL and ACEA E7/B4/A3 specifications.