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AMSOIL Synthetic 15W-40 Diesel Oil (DME)
AMSOIL Premium API CJ-4 Synthetic
15W-40 Diesel Oil (DME)

Superior Shear Stability and Extended Drain Intervals
in Ultra-Low Emission Diesel Engines. AMSOIL
Synthetic 15W-40 Diesel Oil (DME) is the premium
choice for API CJ-4 emission-quality diesel oil required
by model-year 2007 and newer diesel engines.
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 Drum
PRODUCT DESCRIPTION
AMSOIL Synthetic 15W-40 Diesel Oil (DME) 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 Synthetic 15W-40 Diesel Oil exceeds the higher
performance demands of modern engines. It withstands the stress of heat, soot and acids to help
prevent deposits, corrosion and wear. 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.

Exceeds Emission System Requirements
AMSOIL Synthetic 15W-40 Diesel Oil is a low-sulfated ash formulation that provides excellent
performance in low-emission diesel engines. 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 15W-40 Diesel Oil can extend drain intervals far beyond those recommended for
conventional petroleum oils. Its unique synthetic formulation and longdrain additive system (10.4
TBN) deliver superior engine protection, cleanliness and performance over extended drain intervals.
AMSOIL Synthetic 15W-40 Diesel Oil provides
maximum protection for up to 3X the OEM-recommended drain interval, and further with oil analysis.

Controls Soot-Thickening and Wear
The advanced synthetic base oils in AMSOIL 15W-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.

Superior Shear Stability, Reduced Oil Consumption
AMSOIL Synthetic 15W-40 Diesel Oil has lower volatility (burn-off) than conventional petroleum oils.
Because less oil vapor passes into the combustion chamber, oil consumption and emissions are
reduced. Lower volatility helps AMSOIL Premium Diesel Oil retain its viscosity after high-temperature
service for continued dependable protection.

Ideal for Fleets
AMSOIL Premium 15W-40 Diesel Oil reduces operating costs through extended drain intervals. It is
engineered for a wide range of applications, allowing fleet operators to consolidate engine oil
inventories in mixed fleets. In addition, it reduces downtime through extended drain intervals and
improved equipment protection.

AMSOIL 15W-40 Diesel Oil
costs less per mile than conventional oil
Fleet Savings vs. conventional 15W-40 Total Lubricant Used Cost Per Gallon Total Lubricant Cost x1
Truck Total Lubricant Cost x50 Trucks
Conventional 15W-40 8 gal x12=96 gal $13.55 $1,301 $65,050
AMSOIL Synthetic 15W-40 8 gal x4=32 gal $34.36 $1,100 $55,000
Total Savings With AMSOIL $201 $10,050
Based on 120,000 miles per year with an OEM-recommended drain interval of 10,000 miles. Does
not include labor, filter, or used oil disposal costs, making AMSOIL even more cost effective.

APPLICATIONS
AMSOIL Premium CJ-4 Synthetic 15W-40 Diesel Oil is recommended for diesel engines and, where
appropriate, gasoline engines requiring any of the following specifications:

• SAE 15W-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 15W-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 CJ-4 Synthetic 15W-40 Diesel Oil 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.

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 severe and normal 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 Synthetic 15W-40 Premium Diesel Oil (DME)
Kinematic Viscosity @ 100°C, cSt (ASTM D445)
14.5
Kinematic Viscosity @ 40°C, cSt (ASTM D445)
98.2
Viscosity Index (ASTM D2270)
153
Cold Crank Simulator Apparent Viscosity @ -35°C, cP (ASTM D5293)
5210
Pour Point °C (°F) (ASTM D92)
-40 (-40)
Flash Point °C (°F) (ASTM D92)
240 (464)
Fire Point °C (°F) (ASTM D-92)
254 (489)
Four-Ball Wear Test (ASTM D4172: 40kgf, 150°C, 1800 rpm, 1 hr) Scar diameter, mm
0.45
Noack Volatility (DIN 51581) 250°C for 1 hour, % weight loss
6.8
Sulfated Ash Content, wt. %
1.0
High Temperature/High Shear Viscosity, cP (ASTM D-4683)
4.2
Total Base Number
10.4
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