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Oil Recommendations: 2-stroke and 4-stroke Detroit Diesel engines


Detroit Diesel Temperature Range

These recommendations apply within the normal ambient temperature range.

For extreme cold, that is at temperatures below -32 degreesC (-25 degreesF), the oil recommendations change.
Consult your oil supplier for further advice.

Detroit Diesel: Oil for 2-stroke and 4-stroke Engines

2-Stroke Engines
Use SAE 40 Mono grade oil

4-Stroke Engines
Use 15W-40 multigrade oil

There are no sulphated ash limits imposed for Detroit Diesel 4-cycle engines.

Detroit Diesel: Changing oil and filters

New Engines or newly overhauled engines

First oil and filter change:
After 50 hours of operation

Change oil every 150 hours
Change filters every 450 hours

Elements allowed in oil of Detroit Diesel 2-stroke engines


Detroit Diesel 2 stroke engines
Normal and max levels of allowable Elements in oil:

normal 15  max 20
normal 15  max 25
normal 65   max 150
normal 20  max 25
normal 35   max 40
normal 0
normal 30   max 40

Detroit Diesel

Excess levels of allowable elements in oil of 2 stroke engines

Indicates problems with:

Chromium  rings
Copper   Bushings, bearings, thrust washers
Iron    Liners, gears, camshafts
Lead    Bearing overlay material
Silicon   Dust, air leaks
Sodium    Internal water leaks
Tin     Piston plating

Trace elements in engine oil

Trace elements found by oil analysis in Detroit Diesel 2-stroke engines, are in some cases quite different from the normal ranges of elements found in 4-stroke cycle engines, therefore special mention of the 2-stroke ranges is made here.

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