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Recommended Engine Oil
Use the engine oil recommended in this manual only. Do not use any other oil.
The use of inappropriate or inferior oils will result in sticking of piston rings, seizure between piston and cylinder, or
premature wear of bearings and moving parts, and significantly shortens the service life of the engine.
Engine Oil Grade
For the engine oil quality, there are oil standards that
are established through special engine tests based on
the engine specifications and operating conditions.
Among those standards, API (American Petroleum
Institute) service classifications are mostly used to
classify engine oils. The SAE standard specifies the
viscosity only, while the API service classification indi-
cates the quality level of engine oil.
There are different grades of diesel engine oil in API
service classification. For the oil for our engines,
please use the grade CF or CH-4 oil which is suitable
to turbo/supercharged and high-load engines.
When using grade CF engine oil, the certified year
must be the year of 2009 or before and the oil must
meet the requirements listed in the
of Recommended Limit of Engine Oil
If 0.2% or less sulfur contact fuel is used in the engine,
CF or CH-4 grade oil can be used. However, the oil
must be CH-4 grade lubricating oil that has base value
of 8.0 mgKOH/g or higher by Hydrochloric acid
method.
If measured by the perchloric acid method, the total
base value must be 11.0 mgKOH/g or more.
Chapter 5 ENGINE OIL
Table 5-1 of "Table
Properties".
OIL
Grade CF
Grade CH-4
API Service
Classification
Fig. 5-1 Engine Oil Grade
OIL
API Service
Classification
5-1
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