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AMSOIL Premium API CJ-4 Synthetic 5W-40 Diesel Oil (DEO)
Maximum Fuel Economy and Extended Drain Intervals in Ultra-Low Emission Diesel Engines.
AMSOIL 5W-40 Synthetic Diesel Oil (DEO) is the premium choice for API CJ-4 emission-quality diesel oil required by model-year 2007 and newer diesel engines. It delivers extraordinary lubrication in diesel engines found in commercial, fleet and personal vehicles. Built with the latest additive and synthetic base oil technology, AMSOIL Premium 5W-40 Synthetic Diesel Oil exceeds the higher performance demands of modern engines. It withstands the stress of heat, soot and acids to help prevent deposits, wear and corrosion. AMSOIL Synthetic 5W-40 is wax-free with a broad viscosity range to provide exceptional cold-weather starting and high-temperature protection. It resists breakdown and offers maximum fuel efficiency over extended drain intervals.
AMSOIL, the leader in automotive synthetic lubrication, produced the world’s first API-qualified synthetic motor oil in 1972. Trust the extensive experience of AMSOIL, the First in Synthetics®, to do the best job protecting your engine.
Download Data Bulletin
Package sizes include:
1-Quart Bottle
1-Quart Bottles (case of 12)
1-Gallon Bottle
1-Gallon Bottles (case of 4) 2.5-Gallon Bottle
2.5-Gallon Bottles (twin pack) 30-Gallon Drum
55-Gallon DrumFOR ONLINE PRICING AND ORDERING CLICK ON THE DESIRED OIL SELECTION BELOW.
Weights:
SAE 5W-40
Or contact us for best price. 
Meets Emission System Requirements
AMSOIL 5W-40 Synthetic Diesel Oil is a low-sulfated ash formulation that exceeds the requirements for low-emission quality diesel oil. It is compatible with all exhaust treatment devices and is designed to extend the service life of diesel particulate filters (DPF).
Extended Drain Performance
AMSOIL Premium 5W-40 Diesel Oil can extend drain intervals far beyond those recommended for conventional petroleum oils. Its unique synthetic formulation and long-drain additive system (10.4 TBN) deliver superior engine protection, cleanliness and performance over extended drain intervals. AMSOIL 5W-40 Synthetic Diesel Oil provides maximum protection for up to 3X the OEM-recommended drain interval and even further with oil analysis. As seen in the graphs, AMSOIL Premium Diesel Oil provided both superior TBN and viscosity retention over 400 hours of severe-service operation.
Improves Fuel Economy
The advanced synthetic technology used to engineer AMSOIL Premium 5W-40 Diesel Oil enhances viscosity properties and is proven to deliver better fuel economy. In fact, the Environmental Protection Agency’s (EPA) Federal Test Procedure confirms that AMSOIL 5W-40 Diesel Oil provides up to 3 percent better fuel economy than conventional 15W-40 diesel oils. At a mix of 55 percent city/45 percent highway driving, the average improvement is 1.6 percent and at straight highway driving the average improvement is 1.25 percent.
Minimizes Oil Consumption and Emissions
Due to its low rate of volatility (burn-off), AMSOIL 5W-40 Synthetic Diesel Oil is able to reduce oil consumption and emissions during operation. Lower volatility helps AMSOIL Premium Diesel Oil retain its viscosity after high-temperature service for dependable protection and excellent fuel economy.
Controls Soot-Thickening and Wear
The advanced synthetic base oils in AMSOIL 5W-40 Diesel Oil are naturally resistant to soot contamination. That, along with a heavy fortification of detergent/dispersant additives, keeps soot particles suspended independently, helping prevent the formation of larger wear-causing particles. Viscosity increase is minimized and soot-related wear is controlled.
APPLICATIONS
AMSOIL Premium CJ-4 Synthetic 5W-40 Diesel Oil is recommended for diesel engines and, where appropriate, gasoline engines requiring any of the following specifications:
• SAE 5W-40 • API CJ-4, CI-4+, CF, SM
• ACEA E7, E9 • Mack EO-O Premium Plus
• DDC Power Guard 93K218
• Caterpillar ECF-3, ECF-2 • Cummins 20081
• Volvo VDS-4 • MB 228.31 • MTU Type I & II
• MAN 3275 • JASO DH-2 • Global DHD-1
• Renault RLD-3
COMPATIBILITY
AMSOIL Synthetic 5W-40 Diesel Oil is compatible with conventional and synthetic motor oils. Mixing AMSOIL motor oils with other oils, however, will shorten the oil life expectancy and reduce the performance benefits. AMSOIL does not support extended drain intervals where oils have been mixed. Aftermarket oil additives are not recommended for
use with AMSOIL motor oils.
SERVICE LIFE
AMSOIL Premium API CJ-4 Synthetic 5W-40 Diesel Oil (DEO) is recommended for extended drain intervals in engines that are unmodified and in good operating condition:
Diesel Engine Service
- Three times (3X) OEM* recommendation, not to exceed 50,000 miles/600 hours or one year, whichever comes first. Drain intervals may be extended further with oil analysis.
- 2007-2009 Caterpillar C13 and C15 on-highway engines must follow OEM drain interval.
- 2007-Present Dodge, Ford and GM light-duty diesel pickups must follow OEM-recommended drain interval. Drain intervals may be extended with oil analysis.
Gasoline Engine Service
- Two times (2X) OEM* recommendation, not to exceed 15,000 miles or one year, whichever comes first.
*Operating conditions and drain intervals for normal and severe service are defined by the OEM. Refer to your owner’s manual.
Note: Extended drain intervals are not recommended when using biofuels containing >10% ethanol or 5% biodiesel (B5). Follow OEM drain intervals or extend drain intervals with oil analysis.
HEALTH & SAFETY
This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Material Safety Data Sheet (MSDS). An MSDS is available via the Internet at www.amsoil.com or upon request at (715) 392-7101. Keep Out of Reach of Children. Don’t pollute. Return used oil to collection centers.
TYPICAL TECHNICAL PROPERTIES AMSOIL Premium API CJ-4 Synthetic 5W-40 Diesel Oil (DEO) Kinematic Viscosity @ 100°C, cSt (ASTM D-445) 14.5 Kinematic Viscosity @ 40°C, cSt (ASTM D-445) 87.9 Viscosity Index (ASTM D-2270) 172 CCS Viscosity @ -30°C, cP (ASTM D-5293) 5932 Flash Point °C (°F) (ASTM D-92) 228 (442) Fire Point °C (°F) (ASTM D-92) 246 (475) Pour Point °C (°F) (ASTM D-97) -46 (-51) NOACK Volatility, % weight loss (g/100g) (ASTM D-5800) 8.8 Four-Ball Wear Test @ 40 kg, 75°C, 1200 rpm, 1 hr, Scar, mm (ASTM D-4172) 0.51 Total Base Number (ASTM D-2896) 10.4 High Temperature/High Shear Viscosity, cP (ASTM D5481) 4.0 Sulfated Ash Content, wt. % 1.0
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