5-3
Chapter 5 ENGINE OIL
*1 API CF grade oil certified in 2009 or before.
*2 Temperature of test I (24°C [75.2°F]), Temperature of test II (93.5°C [200.3°F]), Temperature of test III (24°C
[75.2°F] after 93.5°C [200.3°F])
*3 Temperature of aluminum panel: 300°C [572°F] and 325°C [617°F], Temperature of engine oil: 100°C [212°F],
Splatter time: 15 seconds
Downtime: 45 seconds, Test time: 8 hours, the properties are the weight of solid product.
Selection of Oil Viscosity
Use the chart on the right to select the appropriate oil
viscosity according to the ambient temperature.
Excessively high oil viscosity causes power loss and
an abnormal rise of oil temperature, while excessively
low oil viscosity accelerates wear due to inadequate
lubrication, and also causes a decrease in engine out-
put.
Fig. 5-2 Selection of Oil Viscosity
Bubbling test *2
I
mL
10/0
JIS K 2518
ISO 6247
II 30/0
III 10/0
Panel caulking test *3
300°C
[572°F]
mg
140 or lower
FED791-3462
325°C
[617°F]
300 or lower
Table 5-1 Table of Recommended Limit of Engine Oil Properties
Item Unit Recommended limit Test method
SAE10W
SAE30
SAE40
SAE15W-40
Temperature
°C [°F]
Engine oil
viscosity
-30
[-21]
-20
[-4]
-10
[14]
10
[50]
20
[68]
30
[86]
40
[104]
50
[122]
0
[32]
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