Meets Requirements for Low-Emission Diesel Oil and is Able to Reduce Diesel Emissions and Oil Consumption
Licensed API CJ-4 Oil
AMSOIL OE Full Synthetic Diesel Engine Oils (Product Codes: OEC, OED), available in 10w30 and 15w40 viscosity grades, are a low-sulfated ash formulation that meet the requirements for low-emission diesel oil. They are compatible with all exhaust treatment devices, including diesel particulate filters (DPF). AMSOIL OE Synthetic Diesel Engine Oils are able to reduce diesel emissions and oil consumption.
AMSOIL OE Synthetic Diesel Engine Oils are licensed API CJ-4 motor oils and are suitable for both modern and older diesel applications, including those equipped with turbochargers. They exceed the higher performance demands of modern engines and withstand the stress of heat, soot and acids to help prevent deposits, wear and corrosion.
AMSOIL OE Synthetic 10w30 and 15w50 Diesel Engine Oils provide excellent protection and performance in both on- and off-road diesel engines and gasoline engines for the recommended oil change intervals stated by the original equipment (OE) manufacturer. API licensed CJ-4, SN.
- Suitable for both modern and older diesel engines, on- and off-road
- Meet requirements for low-emission diesel oil
- Compatible with all exhaust treatment devices
- Designed for engines equipped with diesel particulate filters (DPF)
- Easier cold-weather starting
- Reduces diesel emissions and oil consumption
- Controls soot thickening
- Formulated for both diesel and gasoline engines, including turbo-charged vehicles
- API CJ-4, SN
- Recommended for oil drain intervals stated by the original equipment manufacturer (OEM)

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AMSOIL OE Full Synthetic 10w30 Diesel Engine Oil Product Code Pkg/Size OECQT-EA Quart Bottle OECQT-CA Quart Bottles (case of 12) OEC1G-EA Gallon Bottle OEC1G-CA Gallon Bottles (case of 4) OECTP-EA 2.5-Gallon Bottle OECTP-CA 2.5-Gallon Bottles (case of 2) OEC30-EA 30-Gallon Drum OEC55-EA 55-Gallon Drum OEC27-EA 275-Gallon Tote AMSOIL OE Full Synthetic 15w40 Diesel Engine Oil Product Code Pkg/Size OEDQT-EA Quart Bottle OEDQT-CA Quart Bottles (case of 12) OED1G-EA Gallon Bottle OED1G-CA Gallon Bottles (case of 4) OEDTP-EA 2.5-Gallon Bottle OEDTP-CA 2.5-Gallon Bottles (case of 2) OED30-EA 30-Gallon Drum OED55-EA 55-Gallon Drum OED27-EA 275-Gallon Tote -
Meet Diesel Emission System Requirements
AMSOIL OE Full Synthetic 10w30 and 15w50 Diesel Engine Oils are a low-sulfated ash formulation that meet the requirements for low emission quality diesel oil and protects under the most severe conditions found in modern diesel engines. They are designed for engines equipped with diesel particulate filters (DPF) and are compatible with all exhaust treatment devices.
Extreme-Temperature Performance
AMSOIL OE Synthetic 10w30 and 15w50 Diesel Engine Oils are formulated to deliver improved heat and oxidation resistance compared to conventional petroleum oil. They provide cleaner engine operation and help to maintain power and fuel efficiency for superior engine performance. AMSOIL OE Diesel Oils also flow dependably in cold-temperatures for easier cold-weather starting and improved engine protection.
Reduce Diesel Emissions and Oil Consumption
Due to their low rate of volatility (burn-off), AMSOIL OE Synthetic 10w30 and 15w50 Diesel Engine Oils are able to reduce diesel oil consumption and emissions. They maintain their excellent film strength even during high-temperature operating conditions to ensure dependable protection, performance and fuel efficiency.
Control Soot Thickening and Wear
AMSOIL OE 10w30 and 15w50 Diesel Engine Oils are formulated with premium synthetic base stocks and robust detergent/dispersant additives that keep soot particles from agglomerating and forming larger wear-causing particles. Their full synthetic formulation delivers optimal protection, maintaining performance by staying in their viscosity grade.
Service Life
AMSOIL OE Synthetic 10w30 and 15w50 Diesel Engine Oils are recommended for the intervals stated by the original equipment manufacturer (OEM). Refer to the owner’s manual for specific oil change interval recommendations. Replace the oil filter at each oil change as recommended by the OEM.
- For best performance, use AMSOIL Ea Oil Filters or Donaldson Endurance Oil Filters.
- For maximum engine and oil life, AMSOIL Ea Bypass Oil Filters are specialized for the removal of small, wear-causing dirt particles. These filters are placed outside the main line of oil circulation, using an AMSOIL Bypass Oil Filtration System mount.
- Please visit our Oil Filter page to see all of these products and more.
Good to Know
- For best results, use AMSOIL Engine and Transmission Flush before installing AMSOIL synthetic motor oil.
- For maximum engine protection, use an AMSOIL Ea Extended Life Oil Filter.
- AMSOIL recommends checking the oil at a minimum of every 3,000 miles to maintain proper fill levels and maximum engine protection.
- Oil Analyzers, Inc., a division of AMSOIL, Inc., provides cost effective, quality oil analysis services.
- Most quick lube service centers will install these products upon request or you can install them yourself.
Applications
AMSOIL OE Full Synthetic 10w30 Diesel Engine Oil (OEC) is recommended for diesel engines and, where appropriate, gasoline engines requiring any of the following specifications:
- API licensed CJ-4, SN
- ACEA E9
- MAN 3575
- Renault RLD-3
- MTU Type 2.1
- Mack EO-O
- Volvo VDS-4, VDS-3
- Cummins CES 20081
- MB 228.31
- CAT ECF-3, ECF-2, ECF-1-a
AMSOIL OE Full Synthetic 15w40 Diesel Engine Oil (OED) is recommended for diesel engines and, where appropriate, gasoline engines requiring any of the following specifications:
- API licensed CJ-4, SN
- ACEA E9
- DDC 93K218
- Cummins CES 20081
- MB 228.31
- CAT ECF-3, ECF-2, ECF-1-a
- Mack EO-O Plus
- Volvo VDS-4
- MAN 3575
- Renault RLD-3
- MTU Type 2.1
Shipping for Online and Catalog Customers
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For more information, please visit the AMSOIL, Inc. website: AMSOIL Shipping, Sales Tax and Product Return Guidelines
Return Policy
Please visit the AMSOIL, Inc. website: AMSOIL Shipping, Sales Tax and Product Return Guidelines