AMSOIL Synthetic 5W-40 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 Synthetic 5W-40 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.
Exceeds Emission System
AMSOIL Synthetic 5W-40 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 fi lters (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 Synthetic 5W-40 Diesel
maximum protection for up to 3X the OEM-recommended
drain interval, even further with oil analysis.
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.
Fleet Savings vs.
|Fuel Economy Savings (1.6%)
|Extended Drain Savings
Total Savings with AMSOIL
*Based on 120,000 miles per year with
an OEM-recommended drain interval of 10,000 miles. Avg.
6 mpg, 32-qt. oil sump, $3/gal. fuel, $34.10/gal. AMSOIL
(Retail), $13.55/gal. conventional diesel oil. Does not
include labor, filter or used oil disposal costs, making
AMSOIL even more cost effective. Pricing samples taken
Reduces Oil Consumption and
AMSOIL Synthetic 5W-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 dependable protection
and excellent fuel economy.
Controls Soot-Thickening and
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.
AMSOIL Premium CJ-4 Synthetic 5W-40 Diesel Oil is
recommended for diesel engines and, where appropriate,
gasoline engines requiring any of the following
• SAE 5W-40 • API CJ-4, CI-4+, CF,
• 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
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
use with AMSOIL motor oils.
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, C15
on-highway engines must follow OEM drain interval.
- 2007-2010 Dodge 6.7L, Ford 6.4L,
GM 6.6L LMM light duty diesel pickups must follow
OEM drain interval. Drain intervals can 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 normal and severe service are defined by
the OEM. Refer to your owner’s manual.
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 upon request at 715-392-7101 or
on the AMSOIL Corporate Website. Keep out of the reach
of children. Don't pollute. Return used oil to
TYPICAL TECHNICAL PROPERTIES
API CJ-4 Synthetic 5W-40 Diesel Oil (DEO)
Viscosity @ 100°C, cSt (ASTM D-445)
Viscosity @ 40°C, cSt (ASTM D-445)
CCS Viscosity @
-30°C, cP (ASTM D-5293)
Flash Point °C
(°F) (ASTM D-92)
Fire Point °C
(°F) (ASTM D-92)
Pour Point °C
(°F) (ASTM D-97)
Noack Volatility (DIN 51581)
250°C for 1 hour, % weight loss
Four-Ball Wear Test (ASTM
D-4172: 40kgf, 75°C, 1200 rpm, 1 hr) Scar
Total Base Number
High Temperature/High Shear
Viscosity, cP (ASTM D-4683)
Content, wt. %