Valvoline All-Fleet Superior LE 15W-40 is a heavy-duty engine oil formulated to deliver outstanding oxidation control and shear stability in modern diesel engines. Produced from premium base oils and a high-quality additive package, this oil provides comprehensive protection for engines equipped with diesel particulate filters (DPF), exhaust gas recirculation (EGR), and selective catalytic reduction (SCR) emission control systems.

The advanced formulation of All-Fleet Superior LE offers multiple performance advantages that keep engines running efficiently under demanding conditions. Its foam protection technology maintains consistent oil pressure and lubrication coverage, while superior soot dispersancy prevents soot-related thickening and abrasive wear. The oxidation-inhibiting chemistry resists thermal breakdown during extended service intervals, and effective low-temperature protection ensures reliable cold-start performance.

Additional benefits include corrosion and rust inhibition that shields critical engine components from chemical attack, valve train wear protection that preserves engine timing and efficiency, and excellent TBN retention that extends the oil's useful life between drain intervals. These combined properties make All-Fleet Superior LE a reliable choice for reducing unplanned maintenance and extending engine service life.

This engine oil is designed for a wide range of heavy-duty applications including on-road trucking, agricultural equipment, construction vehicles, and mining machinery. Its versatile 15W-40 viscosity grade provides year-round protection in diverse climatic conditions, making it particularly well-suited for mixed fleets operating across multiple industries and geographies. Fleet operators benefit from simplified inventory management and consistent protection across their entire vehicle and equipment roster.