operators_manual

These oils meet performance
characteristics that conform to the lubricant
industry standards and are sufficient
protection when used according to the
recommendations. Aftermarket lubricating
oil additives are not necessary to enhance
engine oil performance and may in some
cases reduce the oil's capability to protect
the engine.
Engine Oil Specifications
Engine oil system specifications.
Engine Oil Specifications for PACCAR MX-13 - Low and High Horsepower Ratings
Oil Pressure at Low Idle (min allowable) 650 ± 50 rpm 14.5 psi at 239°F (100 kPa at 1
15°C) oil temperature
At Road Speed 900-1200 rpm (min allowable) 20-29 psi at 239°F (140-200 kPa at 115°C) oil temperature
At Road Speed 1200-2100 rpm (min allowable) 29 psi at 239°F (200 kPa at 115°C) oil temperature
Regulated Oil Pressure (nominal) 33 psi at 239°F (230 kPa at 115°C) oil temperature
Total System Capacity (oil pan and new oil filters) 42 U.S. qts (40.0 liters)
Engine Lubrication and
Filter Intervals
Oil change intervals for normal and severe
duty applications.
Oil drain interval recommendations are
based on vehicle application or engine duty
cycle. PACCAR recommends the use of
high quality lubricating oil as indicated in
the Engine Lubricating Oil
Recommendations and Specifications
section.
Perform these maintenance procedures
according to the Preventive Maintenance
Schedule.
CAUTION
Extending the oil and filter change in-
terval beyond the
recommendations
will decrease the engine life due to
factors such as corrosion, deposits,
and wear. Engine oil filters capture dirt
and remove deposits
from the oil to
prolong the life of internal moving com-
ponents. Follow the oil and filter
change intervals as recommended in
this section of the manual. Failure to
comply may result in equipment or
property damage.
ENGINE MAINTENANCE - Engine Oil Specifications
40 Y53-1181-1K1 (08/2018)
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