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Maintenance Section
Lubricant Specifications
•
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 direct injection engines, see Table 2 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)
In order to make the proper choice of a commercial
oil, refer to the following explanations:
EMA LRG-1 – The Engine Manufacturers
Association (EMA) has developed lubricant
recommendations as an alternative to the API oil
classification system. LRG-1 is a Recommended
Guideline that defines a level of oil performance
for these types of diesel engines: high speed, four
stroke cycle, heavy-duty, and light duty. LRG-1 oils
may be used in Caterpillar engines when API CH-4,
API CG-4, and API CF-4 oils are recommended.
LRG-1 oils are intended to provide superior
performance in comparison to API CG-4 and API
CF-4.
LRG-1 oils will meet the needs of high performance
Caterpillar diesel engines that are operating in
many applications. The tests and the test limits that
are used to define LRG-1 are similar to the new
API CH-4 classification. Therefore, these oils will
also meet the requirements of the low emissions
diesel engines. LRG-1 oils are designed to control
the harmful effects of soot with improved wear
resistance and improved resistance to oil filter
plugging. These oils will also provide superior piston
deposit control for engines with either two-piece
steel pistons or aluminum pistons.
All LRG-1 oils must complete a full test program
with the base stock and with the viscosity grade of
the finished commercial oil. The use of “API Base
Oil Interchange Guidelines” are not appropriate for
LRG-1 oils. This feature reduces the variation in
performance that can occur when base stocks are
changed in commercial oil formulations.
LRG-1 oils are recommended for use in extended
oil change interval programs that optimize oil life.
These oil change interval programs are based
on oil analysis. LRG-1 oils are recommended
for conditions that demand a premium oil. Your
Caterpillar dealer has the specific guidelines for
optimizing oil change intervals.
API CH-4 – API CH-4 oils were developed in
order to meet the requirements of the new high
performance diesel engines. Also, the oil was
designed to meet the requirements of the low
emissions diesel engines. API CH-4 oils are also
acceptable for use in older diesel engines and in
diesel engines that use high sulfur diesel fuel. API
CH-4 oils may be used in Caterpillar engines that
use API CG-4 and API CF-4 oils. API CH-4 oils will
generally exceed the performance of API CG-4 oils
in the following criteria: deposits on pistons, control
of oil consumption, wear of piston rings, valve train
wear, viscosity control, and corrosion.
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