Mobil Delvac 1300 Super 15w-40 is a premium semi-synthetic Diesel Engine Oil. The Delvac series is a premium line of heavy duty equipment lubricants manufactured by Mobil Lubricants. "1300 Super" refers to premium synthetic blended diesel engine oil that is specially formulated for compatibility with exhaust after treatment systems using diesel particulate filters (DPF), diesel oxidation catalysts (DOC) and/or selective catalytic reduction (SCR). 15w-40 is the thickness of the oil based on Society of Automotive Engineers (SAE) standards. 

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