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HPR Diesel 10 is a premium high performance semi synthetic SAE 10W-40, non-friction modified engine oil. It features a DOUBLE LAYER of engine wear protection with FULL ZINC and Penrite's advanced EXTRA TEN technology. It contains a combination of high technology additives, including increased dispersant levels and low shear viscosity modifiers. It protects against corrosion, oil oxidation and sludge under all operating conditions. HPR Diesel 10 meets the requirements of API CI-4/SL and ACEA A3/B4 as well as many manufacturers' requirements.