A minimum viscosity of 1.4 cSt at 38C (100F) is
required to properly lubricate Caterpillar fuel system
components. Kerosene-type fuels have a lower viscosity
for low temperature operation.
The kerosene-type fuels have less energy per unit
volume than diesel fuels, producing less peak power.
More kerosene type fuel is needed than diesel fuel to do
the same amount of work.
Caterpillar diesel engines are capable of burning a wide
range of distillate fuels. Burning clean, stable blends of
distillate fuel meeting the listed requirements will provide
quality engine service life.
DISTILLED FUEL RECOMMENDATIONS
FOR DIESEL ENGINES
Aromatics (ASTM D1319)
Ash (ASTM D482)
0.02% Max. Weight
35 Minimum for PC Engines
40 Minimum for Dl Engines
Cloud Point (ASTM D97)
Cloud point will not be
above the lowest expected
Gravity API (ASTM D287)
30 Minimum and 45 Maximum
Pour Point (ASTM D97)
6 (10f) Below Ambient Min.
Sulfur (ASTM D2788,
D3605 or D1552)
See the topic "Sulfur
kinematic at 38C (100F)
20.0 cSt Max
1.4 cSt Min.
Water and Sediment
1These requirements are the requirements when the fuel is
delivered to the fuel system.
NOTE: When economics or fuel availability dictate,
other fuel types may be burned in the engine.
Consult your Caterpillar dealer for more
information and advice on any specific fuel.
During average starting conditions, direct injection
engines require a minimum cetane number of 40. A
higher cetane value may be required for high altitude or
cold weather operation.
Clean fuels should have no more than 0.1 percent of
sediment and water. Fuel stored for extended periods of
time may oxidize and form solids, causing filtering
Fuel pour point should be at least 6C (10F) below the
lowest ambient temperature at which the engines must
start and operate. Lower pour points of No.1 or No.1-D
fuel may be necessary in extremely cold weather.
The cloud point should be below the lowest ambient
temperature at which the engines must start and
operate, in order to prevent the fuel filter elements from
plugging with wax crystals. Refer to the topic Fuel
SEBU5898, for additional information.
Fuel viscosity affects the lubrication of fuel system
components and fuel atomization. The provided
viscosity limits address both of those affects.
Fuel additives are generally not recommended or
needed for the specified fuels listed. Cetane improvers
can be used as necessary for direct injection engine
requirements. Biocides may be needed to eliminate
microorganism growth in storage tanks. In cold weather
conditions, treatment for entrained water may also be
Consult your fuel supplier about the use of additives to
prevent incompatibility among additives already in the
fuel and the additives to be used.