ENGINE MAINTENANCE - Engine Lubricating Oil Recommendations and Specifications Engine Oil Viscosity Chart CAUTION Use of non-genuine oil filters can cause severe engine damage. 2 quality SAE 10W-30 API CK-4/CJ-4 heavy- duty engine oil. The primary PACCAR recommendation is for the use of 10W-30 multigrade lubricating oil for normal operation at ambient temperatures above 5°F (-15°C). For ambient temperatures below 5°F (-15°C) SAE 5W-30 may be used, provided it meets API CK-4/CJ-4 oil specifications and biodiesel or biodiesel blended fuel is not used as fuel for the engine.
Using a multigrade oil helps improve engine cranking in low-temperature conditions, reduces deposit formation and increases engine durability. Engine Lubricating Oil Recommendations and Specifications -40 -30 -20 -10 0 10 20 30 40 50 60 ( 1 ) Temperature °C 1. If engine is equipped with an active oil pan heater, use before engine start. 2. Initial factory oil fill: API CK-4 10W-30 PACCAR engine oil type, viscosity, and additives. A major factor in maintaining engine performance and durability is the proper use of quality engine lubricating oils used in conjunction with the appropriate oil drain and filter change intervals.
Attempting to extend the oil and filter change interval beyond the manufacturers recommendations may decrease engine life due to factors such as corrosion, deposits, and wear. See Engine Lubrication and Filter Intervals to determine which oil drain interval to use for an application. NOTE Any of the oil weights listed in the chart above are acceptable to use as long as the oil meets API CK-4/CJ-4 oil 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 Y53-1166-1G1 (08/2018) 39 NOTE -40 -20 It is the operator’s responsibility to fol- low these recommendations to ensure that the engine warranty is not affect- Temperature °F 0 20 40 60 80 100 120 1 5W40 10W40 15W40 ed. PACCAR recommends the use of high- 5W30 10W30 (2)