affected by the use of biodiesel. Use oil analysis to
monitor the condition of the engine oil. Use oil
analysis also to determine the oil change interval that
is optimum.
Note: These engine oils are not approved by
Perkins and these engine oils must not be used:
CC, CD, CD-2, CF-4, CG-4, CH-4, and CI-4.
Lubricant Viscosity Recommendations
for Direct Injection (DI) Diesel Engines
The correct 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 illustration 37 (minimum temperature) in
order to determine the required oil viscosity for
starting a cold engine.
Refer to illustration 37 (maximum temperature) to
select the oil viscosity for engine operation at the
highest ambient temperature that is anticipated.
Generally, use the highest oil viscosity that is
available to meet the requirement for the temperature
at start-up.
Illustration 37
g03329707
Lubricant Viscosities
Supplemental heat is recommended for cold soaked
starts below the minimum ambient temperature.
Supplemental heat may be required for cold soaked
starts that are above the minimum temperature that
is stated, depending on the parasitic load and other
factors. Cold soaked starts occur when the engine
has not been operated for aperiodof time. This
interval will allow the oil to become more viscous due
to cooler ambient temperatures.
Aftermarket Oil Additives
Perkins does not recommend the use of aftermarket
additives in oil. It is not necessary to use aftermarket
additives to achieve the engines maximum service,
life or rated performance. Fully formulated, finished
oils consist of base oils and of commercial additive
packages. These additive packages are blended into
the base oils at precise percentages to help provide
finished oils with performance characteristics that
meet industry standards.
There are no industry standard tests that evaluate
the performance or the compatibility of aftermarket
additives in finished oil. Aftermarket additives may
not be compatible with the finished oils additive
package, which could lower the performance of the
finished oil. The aftermarket additive could fail to mix
with the finished oil. This failure could produce sludge
in the crankcase. Perkins discourages the use of
aftermarket additives in finished oils.
To achieve the best performance from a Perkins
engine, conform to the following guidelines:
• See the appropriate “Lubricant Viscosities”. Refer
to the illustration 37 to find the correct oil viscosity
grade for your engine.
• At the specified interval, service the engine. Use
new oil and install a new oil filter.
• Perform maintenance at the intervals that are
specified in the Operation and Maintenance
Manual, “Maintenance Interval Schedule”.
Oil analysis
Some engines may be equipped with an oil sampling
valve. If oil analysis is required, the oil sampling valve
is used to obtain samples of the engine oil. The oil
analysis will complement the preventive maintenance
program.
The oil analysis is a diagnostic tool that is used to
determine oil performance and component wear
rates. Contamination can be identified and measured
by using oil analysis. The oil analysis includes the
following tests:
• The Wear Rate Analysis monitors the wear of the
engines metals. The amount of wear metal and
type of wear metal that is in the oil is analyzed.
The increase in the rate of engine wear metal in
the oil is as important as the quantity of engine
wear metal in the oil.
• Tests are conducted to detect contamination of the
oil by water, glycol, or fuel.
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