Engineered for all types of diesel engines with an emphasis on modern, low emission heavy duty diesel engines. High 12 TBN controls acids from combustion blow-by and EGR. High levels of detergency and dispersancy additives control soot thickening, oxidation and wear. Resists bore polishing, deposit formation and ring sticking. Provides clean engine performance. Extended drain capabilities reduce downtime and motor oil expenses.

Product Description

AMSOIL Synthetic Heavy-Duty Diesel and Marine Motor Oil combines the superior lubricity and performance capabilities of a premium synthetic lubricant with special rust and corrosion inhibitors. AMSOIL Synthetic Heavy-Duty Diesel and Marine Motor Oil is recommended for engines used in marine applications, as well as diesel engines used in trucks, fleets, mining, earth moving, construction and farm equipment. Other applications include taxi and local delivery fleets with gasoline or diesel engines. With its extended drain intervals, AMSOIL Synthetic Heavy-Duty Diesel and Marine Motor Oil reduces maintenance costs, downtime and the cost of waste oil disposal.

Provides High Shear Stability

AMSOIL Synthetic Heavy-Duty Diesel and Marine Motor Oil surpasses the European ACEA and North American SAE oil specifications for high temperature/high shear (HTHS) viscosity. It is significantly more shear stable than conventional motor oils, retaining its viscosity at temperatures and loads that break down conventional oils. AMSOIL Synthetic Heavy-Duty Diesel and Marine Motor Oil maintains an extremely protective viscosity of greater than 3.7 cP at 302°F (150°C) in the ASTM D-4683 High Temperature/High Shear Test, exceeding the test limits.

Prevents Rust and Corrosion

AMSOIL Synthetic Heavy-Duty Diesel and Marine Motor Oil contains special rust and corrosion-inhibiting additives to prevent the rusting or corrosion of iron, copper, lead and aluminum materials.

Improves Fuel Economy

The premium quality synthetic base stocks in AMSOIL Synthetic Heavy-Duty Diesel and Marine Motor Oil provide a tough lubricating film on all engine parts, reducing friction and fuel consumption. Reduced fuel consumption reduces exhaust emissions of carbon dioxide, water and particulates.

Resists Oxidation - Reduces Engine Wear

Conventional oils oxidize at high temperatures, causing sludge and deposit build-up that decrease fuel efficiency and contribute to corrosion and increased engine wear. AMSOIL Synthetic Heavy-Duty Diesel and Marine Motor Oil, with a flash point of 442°F (228°C), resists oxidation and thermal breakdown far better than conventional oils. It continues to provide maximum protection at tempera-tures that oxidize conventional oils. Also, the advanced heat transfer capabilities and high lubricity of AMSOIL Synthetic Heavy-Duty Diesel and Marine Motor Oil helps engines run cooler and reduces wear.

Extended Drain Intervals

AMSOIL Synthetic Heavy-Duty Diesel and Marine Motor Oil is formulated for extended drain intervals. Its unique synthetic formulation, improved detergent/dispersant capabilities, and long drain additive package ensure maximum engine protection, cleanliness and performance over extended drain periods. Its advanced 12 TBN formulation keeps engines in superb condition even when the oil is used for extended drain intervals.

Provides Low Temperature Protection

AMSOIL Synthetic Heavy-Duty Diesel and Marine Motor Oil remains fluid at temperatures as low as -47°F (-44°C). It circulates rapidly to provide vital lubrication and prevent engine wear caused by lack of oil flow. AMSOIL Synthetic Heavy-Duty Diesel and Marine Motor Oil allows quicker, easier cold temperature starting with less engine wear.

Reduces Oil Consumption and Emissions

AMSOIL Synthetic Heavy-Duty Diesel and Marine Motor Oil passes the NOACK Volatility Test. Many conventional lubricants cannot pass this requirement. Low volatility means less oil vapor passing into the combustion chamber. A reduction of oil vapor means lower oil consumption and lower exhaust emissions. The high detergent alkalinity of AMSOIL Synthetic Heavy-Duty Diesel and Marine Motor Oil also helps reduce oil consumption.

Mixing Amsoil

AMSOIL Synthetic Heavy-Duty Diesel and Marine Motor Oil is compatible with conventional petroleum oils and other synthetic oils; however, mixing AMSOIL Synthetic Heavy-Duty Diesel and Marine Motor Oil with a conventional oil will shorten the extended drain period of AMSOIL Synthetic Heavy-Duty Diesel and Marine Motor Oil. Engine oil additives or after-market products are not recommended for use with AMSOIL Synthetic Heavy-Duty Diesel and Marine Motor Oil.

New Vehicle Under Warranty

The use of AMSOIL Synthetic Synthetic Heavy-Duty Diesel and Marine Motor Oil will not void new vehicle warranties. New vehicle warranties are based on the use of oils meeting specific API service classifications and SAE viscosity grades. AMSOIL Synthetic Heavy-Duty Diesel and Marine Motor Oil meets the current API and SAE requirements and is perfectly suited for use in any new vehicle stipulating those requirements in its owner's manual.

Service Life

AMSOIL Synthetic Heavy Duty Diesel & Marine Motor Oil is recommended for extended drain intervals in unmodified(1), mechanically sound(2) vehicles or equipment as follows:

Personal Light Truck Diesel Engine Service

• Normal Service(3) -- Up to 25,000 miles or one year, whichever comes first, or longer based on oil analysis.

• Severe Service(4) -- Up to 15,000 miles or one year, whichever comes first, or longer based on oil analysis.

• Replace AMSOIL Ea™ full flow oil filter at the time of oil change up to 25,000 miles (other brands at standard OEM* intervals).

Commercial or Fleet Vehicles, Long-Haul Trucks, Marine Craft, RV, Off-Road Equipment

• Non-EGR equipped diesels -- extend drain intervals up to two times (2X) the OEM* recommended drain interval or one year, whichever comes first, or longer based on oil analysis.

• EGR equipped or low emission diesels -- extend drain intervals based on oil analysis or use the longest drain recommendation of the OEM*.

• Replace Donaldson Endurance™ or AMSOIL Ea™ full flow oil filters at the time of oil change up to two times (2X) longer than the OEM* standard interval, not to exceed 60,000 miles in long-haul trucks.

Gasoline Engine Service

• In gasoline engines, oil drain intervals may be extended up to two times (2X) the OEM* recommended drain interval (not to exceed 15,000 miles without oil analysis) or one year, whichever comes first. Replace AMSOIL Ea™ full flow filter at the time of oil change up to 25,000 miles. Replace other brand oil filters at standard OEM* intervals.

*OEM = Original Equipment Manufacturer

(1) Engines operating under modified conditions are excluded from extended drain recommendations. Examples include the use of performance computer chips; non-OEM approved exhaust, fuel or air induction systems; and the use of fuels other than those recommended for normal operation by the manufacturer.

(2) Engines are in good working condition and within the factory design settings. Mechanically sound engines, for example, do not leak oil or consume excessive amounts, are not worn out, do not overheat, do not have internal or external anti-freeze leaks and have a properly working emission control system. AMSOIL recommends repairs be made to malfunctioning engines prior to the installation of AMSOIL synthetic oils.

(3) Personal transportation vehicles frequently traveling greater than 10 miles (16 km) at a time and not operating under severe service.

(4) Extensive engine idling, daily short trip driving less than 10 miles (16 km), frequent towing, plowing, hauling heavy loads or dusty-condition driving.

AMSOIL Ea™ and Donaldson Endurance™ full flow oil filters are designed for extended drain intervals. They stop smaller particles, have less restriction and last longer than regular filters. For best performance, use AMSOIL Ea or Donaldson Endurance oil filters.

AMSOIL by-pass oil filters are specialized for the removal of small, wear-causing dirt particles, thereby extending engine life. AMSOIL encourages using an AMSOIL bypass filter system for maximum engine and oil life.

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