Paccar PX 8 Operator's Manual - page 69
of
94
Maintenance Specifications
PACCAR
Y53-1030A 12/09
– 63 –
CES: Cummins Engineering Standard
PACCAR allows, for midrange applications, the use of lubri-
cating oils that meet or exceed CES 20078 or CES 20081
with no change in oil drain interval. But, if a non-low ash lubri-
cating oil meeting the Cummins Engineering Standard (CES)
classification CES 20078 is used, the service interval(s) for
the aftertreatment system will be reduced.