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Maintenance Section
Lubricant Specifications
Lubricant Viscosity
Recommendations (3116 and
3126 Marine Engines)
The proper SAE viscosity grade of oil is determined
by the minimum ambient temperature during
cold engine start-up, and the maximum ambient
temperature during engine operation.
Refer to Table 3 (minimum temperature) in order
to determine the required oil viscosity for starting
a cold engine.
Refer to Table 3 (maximum temperature) in order to
select the oil viscosity for engine operation at the
highest ambient temperature that is anticipated.
Generally, use the highest oil viscosity that is
allowed for the ambient temperature at start-up.
Ta bl e 3
Engine Oil Viscosity
Ambient Temperature
API CF-4 Oil
Viscosity Grade
Minimum Maximum
SAE 30 0 C (32 F) 40 C (104
F)
SAE 40 5
C (41 F)
50
C (122 F)
i01123508
Engine Oil for Precombustion
Chamber (PC) Diesel Engines
SMCS Code: 1348
Caterpillar Diesel Engine Oil
Caterpillar Oils have been developed and tested in
order to provide the full performance and service
life that has been designed and built into Caterpillar
Engines. Caterpillar Oils are currently used to fill
diesel engines at the factory. These oils are offered
by Caterpillar dealers for continued use when the
engine oil is changed. Consult your Caterpillar
dealer for more information on these oils.
Due to significant variations in the quality and in
the performance of commercially available oils,
Caterpillar makes the following recommendations:
•
Caterpillar Diesel Engine Oil (10W30)
•
Caterpillar Diesel Engine Oil (15W40)
Caterpillar multigrade Diesel Engine Oil is
formulated with the correct amounts of detergents,
dispersants, and alkalinity in order to provide
superior performance in Caterpillar Diesel Engines.
Caterpillar multigrade Diesel Engine Oil is available
in two viscosity grades (10W30 and 15W40). For
precombustion chamber engines, see Table 4 in
order to choose the correct viscosity grade for the
ambient temperature. Multigrade oils provide the
correct viscosity for a broad range of operating
temperatures.
Multigrade oils are effective in maintaining low oil
consumption and low levels of piston deposits.
Caterpillar multigrade Diesel Engine Oil can be
used in other diesel engines and in gasoline
engines. See the engine manufacturer’s guide for
the recommended specifications. Compare the
specifications to the specifications of Caterpillar
multigrade Diesel Engine Oil. The current industry
standards for Caterpillar Diesel Engine Oil are listed
on the product label and on the data sheets for the
product.
Consult your Caterpillar dealer for part numbers
and for available sizes of containers.
Commercial Oils
The performance of commercial diesel engine
oils is based on American Petroleum Institute
(API) classifications. These API classifications are
developed in order to provide commercial lubricants
for a broad range of diesel engines that operate at
various conditions.
If Caterpillar multigrade Diesel Engine Oil is not
used, only use commercial oils that meet the
following classifications:
•
EMA LRG-1 multigrade oil (preferred oil)
•
API CH-4 multigrade oil (preferred oil)
•
API CG-4 multigrade oil (preferred oil)
•
API CF-4 multigrade oil (acceptable oil)
•
API CF oil (acceptable oil for PC engines)
In order to make the proper choice of a commercial
oil, refer to the following explanations:
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