GHG17 DD Medium Duty Operators Manual Synthetic oils may be used in Detroit™ engines provided they are approved by a DFS . The use of synthetic oils does not necessarily ensure the extension of the recommended oil drain intervals beyond the limits. Use of Supplemental Additives Lubricants meeting the Detroit™ specifications outlined in this publication already contain a balanced additive treatment. Supplemental additives are generally not necessary and can even be harmful. These additives may be marketed as either oil treatments or engine treatments and are discouraged from use in Detroit™ engines.
Engine damage resulting from the use of such materials is not covered by your Detroit™ warranty. Detroit™ will not provide statements beyond this publication relative to their use. How to Replace the Lubricating Oil and Oil Filter The oil filter is an integral part of the lubrication system. Proper filter selection and maintenance are important to satisfactory engine performance and service life. The filter should be used to maintain a clean system, not to clean up a contaminated system. The maintenance intervals for the appropriate duty cycle are listed in tables in this manual. Change the oil and replace the lubricating oil filter as follows: NOTE:
If the used oil was contaminated by fuel or coolant, it may be necessary to take the vehicle to a certified Detroit Service Center. The Service Center may drain the oil and then remove the oil pan, oil pump, and oil pump intake manifold to drain the remaining oil held back by the backflow valve. It is important to remove all contaminated oil from the engine. NOTE: Change the engine oil only when the engine oil temperature is approximately 60°C (140°F). Changing cold oil will result in extended drain times. WARNING: PERSONAL INJURY To avoid injury, never remove any engine component while the engine is running. 1. Place the transmission in neutral, and set the parking brake. NOTICE:
Use care to prevent foreign objects from entering the filter housing. 2. Clean outside of the oil filter housing. All information subject to change without notice. 83 DDC-SVC-MAN-0192 Copyright © 2017 DETROIT DIESEL CORPORATION