ENGINE MAINTENANCE - Engine Oil Capacities and Pressures precise amounts of additives blended into the lubricating oil to meet stringent performance requirements. CAUTION such as corrosion, deposits, and wear. Failure to comply may result in equip- ment damage. A sulfated ash limit of 1.85 percent has been placed on all engine lubricating oils recommended for use in PACCAR engines. Higher ash oils can cause valve and/or piston damage and lead to excessive oil consumption. Failure to comply may result in equipment damage. These oils meet performance characteristics that conform to the lubricant industry standards and are sufficient protection when used according to the recommendations.
Aftermarket lubricating oil additives are not necessary to enhance engine oil performance and may in some cases reduce the oil's capability to protect the engine. 2 Additional information regarding lubricating oil availability throughout the world is available in the EMA Lubricating Oils Data Book for Heavy-Duty Automotive and Industrial Engines. The data book can be ordered from: Engine Manufacturers Association, Two North LaSalle Street, Chicago, IL 60602; (312) 827-8733, ( www.enginemanufacturers.org ). CAUTION Aftermarket Oil Additive Usage Engine Oil Capacities and Pressures The use of a synthetic-base oil does not justify extended oil change inter- vals.
Extended oil change intervals can decrease engine life due to factors PACCAR does not recommend the use of aftermarket oil additives. Today's high- quality engine lubricating oils are very sophisticated. Most oils already contain Engine oil system specifications. Engine Oil Capacity and Acceptable Pressures Y53-1185-1E1 (04/16/18) 45 PACCAR PX-9 Oil Pressure At Low Idle (minimum allowable) 10 psi (69 kPa) At Road Speed (minimum allowable) 30 psi (207 kPa) Regulated oil pressure 55 psi (379 kPa)