Paccar PX-9 Operator's Manual - page 81
MAINTENANCE 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 oil for engine
break-in that will be used during normal
operation.
CAUTION
A sulfated ash limit of 1.85 percent
has been placed on all engine lu-
bricating oils recommended for use
in PACCAR engines. Higher ash
oils can cause valve and/or pis-
ton damage and lead to excessive
oil consumption. Failure to comply
may result in equipment damage.
CAUTION
The use of a synthetic-base oil
does
not
justify
extended
oil
change intervals.
Extended oil
change intervals can decrease en-
gine life due to factors such as cor-
rosion, deposits, and wear. Failure
to comply may result in equipment
damage.
Additional information regarding
lubricating oil availability throughout
the world is available in the EMA
Lubricating Oils Data Book for
Heavy-Duty Automotive and Industrial
Engines. The data book can be
ordered from: Engine Manufacturers
Association, Two North LaSalle Street,
Chicago, IL 60602; (312) 827-8733,
(www.enginemanufacturers.org).
Aftermarket Oil Additive Usage
PACCAR does not recommend the use
of aftermarket oil additives. Today's
high-quality engine lubricating oils are
very sophisticated. Most oils already
contain precise amounts of additives
blended into the lubricating oil to meet
stringent performance requirements.
These furnished oils meet performance
characteristics that conform to
the lubricant industry standards.
Aftermarket lubricating oil additives are
not necessary to enhance engine oil
performance and in some cases can
reduce the furnished oil's capability to
protect the engine.
(12/2014)
Y53-1185-1B1
5-27
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