Dodge RAM PROMASTER 2018 Diesel Supplement page 72

70 TECHNICAL SPECIFICATIONS
FUEL REQUIREMENTS
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, No. 2 diesel fuel meeting
ASTM (formerly known as the American Society for Test-
ing 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 No. 2
diesel fuel or dilute the No. 2 diesel fuel with 50% No. 1
diesel fuel. This will provide better protection from fuel
gelling or wax-plugging of the fuel filter.
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. If water is
detected in the water separator while the engine is running
or while the ignition switch is in the ON/RUN position,
the "Generic Warning Light" will illuminate and the spe-
cific message, "Service Fuel Filter" will appear in the
instrument cluster display.
If this occurs you should stop the engine and drain the
water from the filter housing.
NOTE: Please see your authorized dealer for draining the
fuel/water separator and fuel filter replacement.
Purchasing good quality fuel and by following the cold
weather advice above, fuel conditioners should not be
required in your vehicle.
NOTE: If available in your area, a high cetane "premium"
diesel fuel may offer improved cold-starting and warm-up
performance.
CAUTION!
If the "Generic Warning Light" remains on and a
"Service Fuel Filter" message displays, DO NOT
START engine before you drain the water from the fuel
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