Lubricating Oil
Use Cummins Premium Blue 15W-40 multi-viscosity oil
or equivalent which meets API Classification CE or CF-4
for turbocharged engines.
Caution: Limited use of oils, such as 5W-30 or 10W-30,
may aid in starting the engine and provide sufficient oil
flow at ambient temperatures below -5°C [23°F]. How-
ever, the continuous use of low viscosity oils may de-
crease engine life. Refer to the accompanying chart.
Lubricating System General Information Section 2 - Lubricating System
N14Page 2-8