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442
TECHNICAL SPECIFICATIONS
FUEL REQUIREMENTS – DIESEL ENGINE
Use good quality diesel fuel from a reputable supplier in
your vehicle. Federal law requires that you must fuel this
vehicle with Ultra Low Sulfur Highway Diesel fuel (15 ppm
Sulfur maximum) and prohibits the use of Low Sulfur
Highway Diesel fuel (500 ppm Sulfur maximum) to avoid
damage to the emissions control system.
For most year-round service, Number 2 Diesel Fuel
meeting ASTM (formerly known as the American Society
for Testing and Materials) specification D-975 Grade S15
will provide good performance. If the vehicle is exposed to
extreme cold (below 20°F or -7°C), or is required to
operate at colder-than-normal conditions for prolonged
periods, use Climatized Number 2 Diesel Fuel or dilute the
No. 2 diesel fuel with 50% Number 1 Diesel Fuel. This will
provide better protection from fuel gelling or wax-plugging
of the fuel filters.
WARNING!
Do not use alcohol or gasoline as a fuel blending agent.
They can be unstable under certain conditions and
hazardous or explosive when mixed with diesel fuel.
Diesel fuel is seldom completely free of water. To prevent
fuel system trouble, drain the accumulated water from the
fuel/water separator using the fuel/water separator drain
provided on both fuel filters. If you buy good quality fuel
and follow the cold weather advice above, fuel
conditioners should not be required in your vehicle. If
available in your area, a high cetane "premium" diesel fuel
may offer improved cold-starting and warm-up
performance.
CAUTION!
If the Water in Fuel Indicator Light remains on, DO NOT
START engine before you drain the water from the fuel
filter(s) to avoid engine damage
page 387.
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F
S
UEL
PECIFICATIONS
The Cummins® Turbo Diesel engine has been developed
to take advantage of the high energy content and
generally lower cost Number 2 Ultra Low Sulfur Diesel Fuel
or Number 2 Ultra Low Sulfur Climatized Diesel Fuels.
Experience has shown that it also operates on Number 1
Ultra Low Sulfur Diesel Fuels or other fuels within
specification.
NOTE:
If you accidentally fill the fuel tank with gasoline on your
diesel vehicle, do not start the vehicle. If you restart
your vehicle you risk damaging the engine and fuel
system. Please call an authorized dealer for service.
A maximum blend of 20% biodiesel meeting ASTM
specification D-7467 may be used with your
Cummins® diesel engine. (Models configured with
B20 Capability.)
In addition, commercially available fuel additives are
not necessary for the proper operation of your
Cummins® diesel engine. However, if seasonably
adjusted fuel is not available and you are operating
below 20°F (-6°C), Mopar® Premium Diesel Fuel
Treatment (or equivalent) may be beneficial to avoid
fuel gelling.
Number 1 Ultra Low Sulfur Diesel Fuel should only be
used where extended arctic conditions (0°F or -18°C)
exist.
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