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Operation Manual Mitsubishi SL-Series diesel engines
Version 08/2004
ENGLISH
LUBRICANT SPECIFICATIONS
8
LUBRICANT SPECIFICATIONS
8.1
Recommended types of engine
oils
Use oils that meet the API engine oil classification
CF or CF-4 class. Proper oil selection assures
cranking ability by maintaining an oil film on the
cylinder walls and bearing surfaces in conditions
which provide low friction and therefore less
cranking effort to achieve cranking speeds
necessary for reliable starting. Improper oil
selection may result in congealed oil film on the
cylinder walls and the bearing surfaces. This can
result in high friction loads and more cranking
effort, thus standing in the way of achieving
sufficient cranking speeds for reliable starting and
affecting engine life.
8.2
Recommended oil viscosities
There are two important considerations related to
satisfactory engine operation under ambient
temperature conditions — (1) the ability to crank
the engine fast enough to assure starting, and (2)
adequate lubrication of internal wearing surfaces
during starting and warm-up. These
considerations can be adequately met through
proper grade selection. Recommended oil
viscosities are shown in the chart below:
Mitsubishi recommends the all-season type
engine oil of SAE 10W-30.
CF or CF-4
Starting
temperature, °C (°F)
-30
(-22)
-25
(-13)
-20
(-4)
-15
(5)
-10
(14)
-5
(23)
0
(32)
10
(50)
20
(68)
30
(86)
40
(104)
Oil viscosities
S A E 3 0
S A E 40
S A E 15 W - 4 0
S A E 1 0 W - 3 0
S A E 5 W - 2 0
Table 8
Recommended oil viscosities
