Filter Specifications
PACCAR is not responsible for problems
caused by non-genuine filters that do not
meet PACCAR performance or durability
requirements.
Contact your local PACCAR authorized
repair location for specific part numbers.
CAUTION
Use of non-genuine PACCAR oil filters
can cause severe engine damage.
Engine Lubricating Oil
Recommendations and
Specifications
A major factor in maintaining engine
performance and durability is the proper
use of quality engine lubricating oils used
in conjunction with the appropriate oil drain
and filter change intervals. Attempting to
extend the oil and filter change interval
beyond the manufacturers
recommendations may decrease engine
life due to factors such as corrosion,
deposits, and wear.
See Engine Lubrication and Filter Intervals
to determine which oil drain interval to use
for an application.
NOTE
It is the operator’s responsibility to fol-
low these recommendations to ensure
that the engine warranty is not affect-
ed.
PACCAR recommends the use of high-
quality SAE 10W-30 API CK-4/CJ-4 heavy-
duty engine oil.
The primary PACCAR recommendation is
for the use of 10W-30 multigrade
lubricating oil for normal operation at
ambient temperatures above 5°F (-15°C).
For ambient temperatures below 5°F
(-15°C) SAE 5W-30 may be used, provided
it meets API CK-4/CJ-4 oil specifications
and biodiesel or biodiesel blended fuel is
not used as fuel for the engine. Using a
multigrade oil helps improve engine
cranking in low-temperature conditions,
reduces deposit formation, increases
engine durability and increases fuel
economy.
Engine Oil Viscosity Chart
-40 -20 0 20 40 60 80 100 120 140
-40 -30 -20 -10 0 10 20 30 40 50 60
Temperature °F
Temperature °C
5W405W40
10W4010W40
15W4015W40
10W30 (2)
5W305W30
(1)
1. If engine is equipped with an active
oil pan heater, use before engine
start.
2. Initial factory oil fill: API CK-4
10W-30
NOTE
Any of the oil weights listed in the
chart above are acceptable to use as
long as the oil meets API CK-4/CJ-4
oil specifications.
New Engine Break-In Oils
PACCAR does not approve the use of
special “break-in” engine lubricating oils for
new or rebuilt PACCAR engines. It is
recommended to use the same lubricating
ENGINE MAINTENANCE - Engine Lubricating Oil Recommendations and Specifications
56 Y53-1166-1M1 (10/2020)
2
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