Paccar PX-9 Operator's Manual - page 80
MAINTENANCE SPECIFICATIONS
1.
All seasons
2.
All seasons
3.
Winter conditions
4.
Winter conditions
5.
Arctic conditions
While the preferred viscosity grade is
10W-30, lower viscosity multigrade oils
can be used in colder climates. See
the accompanying chart. Any viscosity
grade lower than 10W-30 must still
meet CES 20081.
Synthetic engine oils, API Group
III and Group IV basestocks, are
recommended for use in PACCAR
engines operating in ambient
temperature conditions consistently
below -13°F (-25°C). Synthetic 0W-30
oils that meet the requirements of API
Group III or Group IV basestocks,
can be used in operations where the
ambient temperature never exceeds
32°F (0°C). Multiviscosity oils rated
0W-30 DO NOT offer the same level of
protection against fuel dilution as do
higher multigrade oils. Higher cylinder
wear can be experienced when using
0W-30 oils in high-load situations.
As these oils have directionally thinner
oil films than 10W-30 oils, top-quality
Fleetguard® filters must be used
above 70°F (20°C). Some oil suppliers
might claim better fuel economy for
these oils. PACCAR can neither
approve nor disapprove any product
not manufactured by PACCAR. These
claims are between the customer and
oil supplier. Obtain a commitment from
the oil supplier that the oil will give
satisfactory performance in PACCAR
engines or DO NOT use the oil.
5-26
Y53-1185-1B1
(12/2014)
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