5-3 Engine Maintenance
450 LXi
Owner Manual
~ 5-3-2 ~
Rev. “C”
5-3.1.3 Lubricant Viscosity Recommendations
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 the following table (minimum temperature) in order to determine the required oil viscosity for starting a cold engine.
Refer to this table in order to select the oil viscosity for engine operation at the highest ambient temperature that is
anticipated.
If ambient temperature conditions at engine start-up require the use of multigrade SAE 0W oil, SAE 0W-40 viscosity grade is
preferred over SAE 0W-20 or SAE 0W-30.
Engine Oil Viscosities for Ambient Temperatures
(1)
Ambient Temperature
Viscosity Grade
Minimum
Maximum
SAE 0W-20
-40°C (-40°F)
10°C (50°F)
SAE 0W-30
-40°C (-40°F)
30°C (86°F)
SAE 0W-40
-40°C (-40°F)
40°C (104°F)
SAE 5W-30
-30°C (-22°F)
30°C (86°F)
SAE 5W-40
-30°C (-22°F)
50°C (122°F)
SAE 10W-30
-18°C (0°F)
40°C (104°F)
SAE 10W-40
-18°C (0°F)
50°C (122°F)
SAE 15W-40
-9.5°C (15°F)
50°C (122°F)
5-3.1.4 S•O•S Oil Analysis
Caterpillar has developed a tool for maintenance management that evaluates oil degradation and the tool also detects the
early signs of wear in internal components. The Caterpillar tool for oil analysis is called S•O•S Analysis and the tool is part of
the S•O•S Services program. S•O•S Oil Analysis divides oil analysis into three categories:
Wear Analysis
Oil Condition
Additional Tests
The wear analysis monitors metal particles, some oil additives, and some contaminants.
Oil condition uses infrared (IR) analysis to evaluate the chemistry of the oil. Infrared analysis is also used to detect certain
types of contamination.
Additional tests are used to measure contamination levels from water, fuel, or coolant. Oil viscosity and corrosion protection
can be evaluated, as needed.
•
•
•
NOTE:
Generally, use the highest oil viscosity that is available to meet the requirement for the temperature at
start-up.
NOTE:
SAE 10W-30 is the preferred viscosity grade for the following diesel engines when the ambient temperature
is above -18°C (0°F) and below 40°C (104°F).
NOTE:
Supplemental heat is
recommended below the minimum
recommended ambient temperature.
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