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436 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 Number 2
diesel fuel with 50% Number 1 diesel fuel. This
will provide better protection from fuel gelling or
wax-plugging of the fuel filters.
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.
FUEL SPECIFICATIONS
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 gaso-
line 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 5% biodiesel meeting
ASTM specification D-975 may be used with
your Cummins diesel engine. (Chassis Cab
models not configured with B20 capability).
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.
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 Ú page 375.
21_DPF_OM_EN_USC_t.book Page 436
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