Shell Rotella T3 15w-40 is a premium Diesel Engine Oil designed particularly for fleets. The Rotella series is a premium line of heavy duty equipment lubricants manufactured by Shell Lubricants. "T-3" refers to premium diesel engine oil for heavy duty fleets that is only available in bulk size containers generally not found in retail stores. 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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