TRUCK SERVICE MANUAL
LUBRICATION
ENGINE (Continued)
DESCRIPTION
LUBRICANT
Cummins:
Oil Recommendations
Light Service Only
Naturally
Turbocharged
All Natural
(Stop-and-Go)
Aspirated
Diesel
Gas Models
All Diesel Models
Diesel Models
Models
All Service
2/5
1
2
API Class CC/SC
API Class CC
API Class CC/CD
API Class CC
1.85% Maximum
1.85% Maximum
1.85% Maximum
.03 to .85%
3
3
3
4
Sulfated Ash Content
Sulfated Ash Content
Sulfated Ash Content
Sulfated Ash Content
1
API classification CC and CD quality oils as used in turbocharged engines and API classification CC/SC quality oils as
used for stop-and-go service are satisfactory for use in naturally aspirated engines.
2
API classification CC/SC and CC/CD indicate that the oil must be blended to the quality level required by both
specifications. The range of oil quality permitted by the CC classification is so broad that some oils that meet the
classification will not provide adequate protection (varnish and ring sticking) for engines operated in certain
applications. For example, turbocharged engines require the additional protection provided by the CD classification.
Engines operated in stop and go service require the additional protection provided by the SC classification.
3
A sulfated ash limit has been placed on all lubricating oils for Cummins engines because past experience has shown
that high ash oils may produce harmful deposits on valves that can progress to guttering and valve burning.
4
Completely ashless oils or high ash content oils, are not recommended for use in gas engines a range of ash content
is specified.
5
SD or SE may be substituted for SC.
584
