Chassis Information --- Section 10
The Executive 2005
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Oil additives should not be used unless the oil supplier or oil manufacturer has been consulted and
provided positive evidence or data establishing satisfactory performance in the engine.
NOTE:
The engine does not require a “break-in” procedure.
INFORMATION:
Refer to the Engine Manufacturers Owners Manual for details on the oil mainte-
nance schedule.
Detroit Engine Requirements:
The maintenance guidelines in the Detroit Diesel Engine Operators Guide are the recommenda-
tions for the engine to extend the engine life and improve performance, resulting in cost efficient
operations. A good maintenance schedule begins with a daily awareness of the engine and its various
systems.
A high grade 15W-40 multiviscosity heavy duty lubricating oil meeting Detroit Diesel require-
ments, American Petroleum Institute (API) specification CI-4 is recommended for EGR equipped
Engines. Lubricating oils meeting API CI-4 or CH-4 may be used in engines without EGR system.
A critical factor in maintaining engine performance and durability is the use of high grade multi-
grade lubricating oil and strict adherence to the maintenance service intervals. At temperatures
below -20F 5W-XX and 10W-XX oils may be used provided they are API CI-4 rated for EGR
equipped engines. Low viscosity oils, used for winter operations, will aid in starting.
CAUTION:
Straight weight, or monograde lubricating oil, is not recommended.
CAUTION:
Do not use oil analysis to extend drain intervals.
Synthetic oils may be used in Detroit Diesel engines provided they are API licensed and meet the
performance and chemical requirements of non-synthetic oils outlined in the Detroit Diesel Engine
Operators Guide. Synthetic oils can improve low temperature flow properties and high temperature
oxidation resistance. Synthetic oils, or oil with adequate low temperature properties used for Arctic
operations where the engine cannot be kept warm when shut down, will aid in starting. The use of syn-
thetic oils should not be used to extend drain intervals. Extended oil change intervals can decrease
engine life and possibly affect the engine warranty.
Oil additives should not be used in the Detroit Diesel engines. Lubricants meeting the Detroit
Diesel specifications outlined in the Operators Guide contain a balanced additive treatment.
Supplemental additives are generally not necessary and can be harmful.
NOTE:
Engine damage resulting in the use of supplemental oil additives is not covered by
Detroit Diesel Corporation warranty.
NOTE:
The engine does not require a "break-in" procedure.
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