Super Tech Heavy Duty SAE 15W-40 Motor Oil is specially engineered for heavy duty diesel and gasoline engines operating under all service conditions. Today heavy-duty diesel lubrication needs are more demanding and complex than ever. Only the most advanced oils can meet the difficult challenge of effectively balancing durability extended drain intervals and emission control. Super Tech Heavy Duty SAE 15W-40 Motor Oil meets that challenge. High detergency and superior dispersancy keep engines clean and soot suspended in the oil despite longer drain intervals and increased soot loading. Higher starting TBN provides added protection against acid build-up that can cause rust and corrosion. Experience the superior difference of Super Tech Heavy Duty SAE 15W-40 Motor Oil. Super Tech: Fluids and protectants that help our customers maintain and care for all of their vehicles keeping them running longer. Super Tech Heavy Duty SAE 15W-40 Motor Oil 2 Gallons Size: