Valvoline All-Fleet Extreme 10W-40 is a super high performance diesel (SHPD) engine oil developed for turbo-charged diesel engines in heavy trucks, buses, and industrial machinery. Formulated with synthetic technology, this oil delivers improved low-temperature properties for reliable cold-weather startups while maintaining thermal stability under extreme operating temperatures.

All-Fleet Extreme is engineered to meet the demanding requirements of major European and international engine manufacturers. Its advanced additive chemistry provides robust protection against wear, deposit formation, and oil degradation over extended drain intervals, reducing maintenance frequency and total cost of ownership for fleet operators.

This engine oil excels in heavy-duty applications where engines face sustained high loads, elevated operating temperatures, and extended service periods. It offers excellent soot handling capability, keeping soot particles suspended in the oil to prevent abrasive wear and filter blockages. The oil also delivers superior protection against bore polishing and piston ring wear, two common issues in high-output turbo-diesel engines.

All-Fleet Extreme 10W-40 is compatible with engines equipped with exhaust gas recirculation (EGR) and selective catalytic reduction (SCR) systems for NOx reduction. However, it is not intended for use in engines fitted with diesel particulate filters (DPF) due to its higher SAPS content. This makes it the ideal choice for Euro 3, 4, and 5 engine platforms that do not require DPF-compatible oils.

Whether in long-distance transport, regional distribution, or heavy vocational service, All-Fleet Extreme 10W-40 provides the engine protection and performance reliability that professional fleet operators demand.