Paccar PX 8 Operator's Manual - page 66
Maintenance Specifications
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Y53-1030A 12/09
PACCAR
CAUTION: Using diesel fuels blended with lubri-
cating may cause damage to your exhaust after-
treatment system. Service intervals for
aftertreatment systems will be reduced. Do not
use diesel fuel blended with lubricating oil in
engines equipped with an aftertreatment sys-
tem.
CAUTION: Do not use high sulfur diesel fuel as it
will damage the exhaust aftertreatment system.
Also, the engine will not meet emission regula-
tions. Use only Ultra Low Sulfur Diesel (ULSD)
fuel
.
NOTE:
The engine has been optimized for use with
an aftertreatment system together with ULSD fuel to
meet the 2010 U.S. Environmental Protection
Agency (EPA) regulations.
Ultra-low sulfur diesel fuel is defined as diesel fuel not
exceeding 0.0015 (15 ppm) mass percent sulfur content
(ultra-low diesel fuel is also defined by ASTM 5-15). There
are no acceptable substitutes.
PACCAR recommends the use of ASTM number 2D fuel.
The use of number 2 diesel fuel will result in optimum engine
performance.
At operating temperatures below 0°C [32°F], acceptable per-
formance can be obtained by using blends of number 2D and
number 1D.