ENGINE MAINTENANCE - Fuel Recommendations twice annually to maintain engine protection. Antifreeze is essential for freeze, overheat, and corrosion protection. The use of supplemental coolant additives (SCAs) is not recommended for extended-life coolants. personal injury, equipment or property damage. 2 For nitrited formulations (NOAT), a heavy- duty extended life coolant that meets ASTM D6210 and Caterpillar EC-1 specifications must be used. The change interval for extended-life coolant containing nitrite and molybdate is 750,000 miles (1,200,000 km) or 12,000 hours of on-road use (8 years or 15,000 hours of off-highway use) on initial fill with no extender added.
The change interval is 1,000,000 miles (1,600,000 km)/20,000 hours/8 years with an extender addition at 500,000 miles (800,000 km)/10,000 hours/4 years. Nitrited Extended Life Coolant Recommended Extended Life Coolant Suppliers CAUTION Dirt or water in the fuel system can cause severe damage to both the fuel pump and the fuel injectors. Due to the precise tolerances of diesel injection systems, it is extremely important that the fuel be kept clean and free of dirt or water. Know your fuel source and make sure all steps are taken for dis- pensing or using clean fuel in your ve- hicle. Failure to comply may result in equipment or property damage.
Authorized PACCAR Engine dealer ® Fuel Recommendations Precautions and recomendations for selecting and using the right diesel fuel. Nitrite-Free Extended Life Coolant Nitrite-free organic acid technology coolant (OAT) may be used if it meets DAF 74002. The change interval for nitrite free coolant is 600,000 miles (1,000,000 km) or 6 years, with no extender needed. DO NOT add coolant extender to nitrite-free coolant. Follow the coolant supplier's drain/flush/fill/ diluting percentages when servicing a vehicle filled with nitrite-free coolant. Additional Recommendations: WARNING The use of diesel fuel that has been mixed with other fuels may cause an explosion.
DO NOT mix gasoline, alco- hol, or gasohol with diesel fuel. Make sure you know your fuel source and use the recommended diesel fuel as indicated in this section of the manual. Failure to comply may result in death, 46 Y53-1166-1G1 (08/2018)