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AR-EXP-CUMMINS-07-00 OWNERS MANUAL
Page 31
WARNING
Do not mix gasoline, alcohol, or gasohol with diesel fuel. This mixture can cause an explosion.
CAUTION
Due to the precise tolerances of diesel injection systems, it is extremely important that the fuel be kept clean and free of
dirt or water. Dirt or water in the system can cause severe damage to both the fuel pump and the fuel injectors.
Cummins Inc. recommends the use of ASTM number 2D fuel. The use of number 2 diesel fuel will result in optimum en-
gine performance.
At operating temperatures below 0°C [32°F], acceptable performance can be obtained by using blends of number 2D
and number 1D.
NOTE
: Lighter fuels can reduce fuel economy.
NOTE: Engines equipped with diesel particulate filters require the use of diesel fuel with 30 ppm sulfur maximum. There
are no acceptable substitutes.
The viscosity of the fuel must be kept above 1.3 cSt at 40°C [104°F] to provide adequate pumping and lubricating char-
acteristics to fuel system components.
The following chart lists acceptable substitute fuels for this engine.
CAUTION
A sulfated ash limit of 1.85 percent has been placed on all engine lubricating oils recommended for use in Cummins
engines. Higher ash oils can cause valve and/or piston damage and lead to excessive oil consumption.
CAUTION
The use of a synthetic-base oil does not justify extended oil change intervals. Extended oil change intervals can
decrease engine life due to factors such as corrosion, deposits, and wear.
Acceptable Substitute Fuels
Number
1D
Diesel
(1)
(2)
(3)
Number
2D
Diesel
(3)
Number
1K Kero-
sene
Jet-A Jet-A1 JP-5 JP-8 Jet-B JP-4 CITE
A OK Not OK A A A A Not OK Not OK Not OK
An "A" means OK only if fuel lubricity is adequate. This means the BOCLE number is 3100 or greater as measured by
ASTM specification D6078, Scuffing Load Ball On Cylinder Evaluator (SLBOCLE). Lubricity can also be measured by ASTM,
specification D6079, ISO 12156, High Frequency Reciporating Rig (HFRR) in which the fuel must have a wear scar di-
ameter of 0.45 mm [0.02 in] or less.
Any adjustment to compensate for reduced performance with a fuel system using alternate fuel is not warrantable.
Winter blend fuels, such as found at commercial fuel-dispensing outlets, are combinations of number 1D and 2D diesel
fuels and are acceptable.