Lubricating Oil System - General Information
B3.9 and B5.9 Series Engines
Section 7 - Lubricating Oil System - Group 07
Lubricating Oil System - General
Some state and federal agencies have determined that
used engine oil can be carcinogenic and cause repro-
ductive toxicity. Avoid inhalation of vapors, ingestion,
and prolonged contact with used engine oil.
To avoid personal injury, avoid direct contact of hot oil
with your skin.
Cummins Engine Company, Inc., recommends the use of
a high-quality SAE-40 heavy-duty engine oil, such as Cum-
mins Premium Blue , which meets the American Petro-
leum Institute (API) performance classification CF/SG.
Limited use of low-viscosity lubricating oils, such as
10W-30, can aid in starting the engine and providing
sufficient lubricating oil flow at ambient temperatures
below -5°C [23°F]. However, the continuous use of low-
viscosity lubricating oils can decrease engine life. Re-
fer to the accompanying chart.