ENGINE MAINTENANCE - Fuel Recommendations CAUTION CAUTION to comply may result in equipment or property damage. Unapproved fuel can reduce economy or possibly damage fuel system com- ponents. Unapproved fuels typically do not have enough lubricity elements in the fuel to properly lubricate the fuel injection system. Be sure you follow the fuel recommendations as indicated in this section of the manual. Failure to comply may result in equipment or property damage. DO NOT use high-sulfur diesel fuel as it will damage the exhaust aftertreat- ment system. Also, the engine will not meet emission regulations. Use only ultra-low-sulfur diesel (ULSD) fuel.
Failure to comply may result in equip- ment or property damage. 2 NOTE PACCAR recommends that the cetane number of diesel fuel be a minimum of 45 for engines that are expected to op- erate at temperatures below 32єF (0єC) and a minimum of 42 for engines that are operated at temperatures above 32єF (0єC). CAUTION If ultra-low-sulfur diesel (ULSD) fuel is not used, the engine may not meet emission regulations, and damage may occur to the exhaust aftertreat- ment system. The use of high-sulfur diesel fuel will damage the exhaust af- tertreatment system and impact the engine emission. ULSD fuel is re- quired for correct operation of the af- tertreatment.
The engine has been op- timized for use with an aftertreatment system together with ULSD fuel to meet the 2013 U.S. Environmental Protection Agency regulations. Failure Using diesel fuel with a lower-than- recommended cetane number can cause hard starting instability, and excessive white smoke. To maintain satisfactory operation at low ambient temperatures, it is important to specify diesel fuel of the correct cetane number. PACCAR requires all permissible fuels to have adequate fuel lubricity. Lubricity can be determined by ASTM, specification D6079, ISO 12156, High Frequency Reciprocating Rig (HFRR) in which the fuel must have a wear scar diameter of 0.02 in. (0.5 mm) or less.
The use of Ultra-low-sulfer-diesel (ULSD) fuel is required for this engine in order to CAUTION Using diesel fuels blended with lubri- cants may cause damage to your ex- haust aftertreatment system. Service intervals for aftertreatment systems will be reduced. DO NOT use diesel fuel blended with lubricating oil in en- gines equipped with an aftertreatment system. Failure to comply may result in equipment or property damage. Y53-1166-1G1 (08/2018) 47