Routine Preventive Maintenance Lubricating Oil and Oil Filter Replacement 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. Authorized Detroit™ service outlets are properly equipped for this type of service. Oil filter replacement should be used to maintain a clean system, but is not sufficient to clean a contaminated system. If the oil is contaminated by fuel or coolant, contact an authorized Detroit™ service outlet for further instructions. 68 All information subject to change without notice. Copyright © 2022 DETROIT DIESEL CORPORATION DDC-SVC-MAN-0217