Phillips 66 Fleet Supreme EC 15w-40

Phillips 66 Fleet Supreme EC 15w-40 is a convention heavy duty fleet diesel engine oil. Fleet Supreme is a mixed fleet diesel engine oil line manufactured by Phillips 66 Lubricants. "EC" refers to "Emissions Compatible" because it 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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