AMSOIL 10W-30 HEAVY-DUTY 100% SYNTHETIC DIESEL OIL

AMSOIL 10W-30 Heavy-Duty 100% Synthetic Diesel Oil delivers serious wear protection and viscosity stability for diesel trucks, equipment, and fleets that operate in demanding conditions. It is a direct upgrade over conventional, synthetic-blend, and competing synthetic diesel oils for operators who want to extend equipment life and reduce unplanned downtime.

Diesel engines face a punishing combination of high combustion pressures, extreme heat, and soot loading that degrades oil faster than most people realize. Soot particles accumulate in the oil and, if not properly managed, clump together into abrasive clusters that accelerate wear on rings, liners, and bearings. Add in the thermal stress of towing heavy loads or running equipment at sustained high RPM, and conventional oils simply break down too fast to keep up.

4X MORE WEAR PROTECTION THAN THE DETROIT DIESEL STANDARD
Ring and liner wear is one of the primary failure modes in high-hour diesel engines. It leads directly to increased oil consumption, loss of compression, reduced horsepower, and higher fuel costs. AMSOIL 10W-30 Heavy-Duty Synthetic Diesel Oil delivered 4X more wear protection than required by the Detroit Diesel DD13 Scuffing Test for specification DFS 93K222, based on independent third-party testing using 10W-30 as the worst-case representation. That level of protection translates to longer equipment life and fewer rebuilds on engines like the DD13, DD15, Cummins ISX, and Caterpillar C13.

MINIMIZES OIL CONSUMPTION
Oil burn-off is more than an inconvenience. It means constantly topping off between changes, and it sends oil vapor into the combustion chamber where it contributes to deposit formation and can affect aftertreatment system performance. AMSOIL Heavy-Duty Synthetic Diesel Oil provides up to 66 percent less oil consumption than required by the API CK-4 standard in the Caterpillar-1N oil consumption test. The NOACK volatility of the 10W-30 is just 4.5 percent weight loss (ASTM D5800), meaning less oil is lost to evaporation during high-temperature operation. For fleets managing dozens of trucks, the reduction in top-off oil alone can meaningfully lower operating costs.

CONTROLS SOOT AND MAINTAINS VISCOSITY
Soot contamination is an unavoidable byproduct of diesel combustion, and it becomes especially problematic in EGR-equipped engines where soot levels in the oil climb faster. AMSOIL Heavy-Duty Synthetic Diesel Oil is formulated with advanced detergent and dispersant additives that keep soot particles suspended individually, preventing them from agglomerating into larger, wear-causing clusters. The result is stable viscosity over the drain interval rather than the progressive thickening that conventional oils experience under high soot loads. A viscosity index of 147 (ASTM D2270) confirms the oil's ability to maintain its protective film strength across a wide temperature range.

PERFORMS IN EXTREME TEMPERATURES
Cold-weather startups are hard on diesel engines. Oil that doesn't flow quickly leaves critical components unprotected during the first moments of operation. AMSOIL 10W-30 Heavy-Duty Synthetic Diesel Oil has a CCS viscosity of 5591 cP at -25°C (ASTM D5293) and a pour point of -38°C (-36°F), so it flows reliably in cold climates common across northern states and Canada. On the hot side, improved oxidation resistance compared to conventional diesel oils keeps the oil stable and prevents the thermal breakdown that leads to varnish, deposits, and shortened engine life. This makes it a strong choice for Ram 2500 and 3500 pickups, Ford Super Duty trucks, and Chevrolet Silverado HD models operating in variable climates.

BROAD SPECIFICATION COVERAGE
AMSOIL 10W-30 Heavy-Duty Synthetic Diesel Oil meets or exceeds a wide range of OEM and industry specifications, making it suitable for mixed fleets and a variety of diesel applications:

• API CK-4, CJ-4, CI-4+, CF
• Volvo VDS4.5, VDS4, VDS3
• Mack EOS-4.5, EO-O
• Renault RLD-4, RLD-3
• Cummins CES 20086, CES 20081
• Caterpillar ECF-2, ECF-3, ECF-1-a
• DDA 93K218, 93K215, 93K214
• DFS 93K222
• ACEA E9, E7
• MB 228.31
• MAN 3575
• MTU Type 2.1, II, I
• JASO DH-2
• Deutz DQC III-10LA
• Chrysler MS 10902
• Ford WSS-M2C171-F1
• Allison TES439

All viscosities in the Heavy-Duty Synthetic Diesel Oil line are also capable of gasoline service per API SN. Consult the owner's manual for proper viscosity recommendations.

AMSOIL Heavy-Duty Synthetic Diesel Oil is compatible with conventional and other synthetic oils, though mixing will reduce the performance benefits.

SERVICE LIFE
AMSOIL recommends following the drain intervals stated by the original equipment manufacturer. Intervals may be extended beyond OEM recommendations with oil analysis. The oil also provides lasting protection for multiple events during competition use; oil analysis should be used to determine the appropriate drain interval in those scenarios.

Property	10W-30 (ADN)	Test Method
Kinematic Viscosity @ 100°C, cSt	12.0	ASTM D445
Kinematic Viscosity @ 40°C, cSt	79.3	ASTM D445
Viscosity Index	147	ASTM D2270
CCS Viscosity @ °C, cP	5591 (-25)	ASTM D5293
Pour Point, °C (°F)	-38 (-36)	ASTM D97
Four-Ball Wear Test, Scar, mm	0.46	ASTM D4172
NOACK Volatility, % weight loss (g/100g)	4.5	ASTM D5800
Total Base Number	10.2	ASTM D2896
High-Temperature/High-Shear Viscosity, cP	3.6	ASTM D5481
Sulfated Ash Content, wt. %	1.0	—