12.4.2.4
Interpretation of the oil analysis for a cylinder oil with BN 25 or lower
For a cylinder oil with BN 25 or lower, refer to
for the interpretation of the drain oil
analysis results.
Fig 12-2
Interpretation of the oil analysis for cylinder oils with BN 25 or lower
0
0
100
200
300
400
500
600
700
5
10
15
20
25
00596
Residual BN in mg KOH/g
Alert area
Danger area. Do not operate in this area
Safe area
T
otal iron (Fe) in mg/kg
NOTE:
There are smooth transitions between the different areas shown in
Use the data that follows for an interpretation of the oil analysis:
•
Safe area
If the residual BN is BN 10 or higher and the iron (Fe) content is less than 200 mg/kg, the
operation is thought to be safe.
•
Alert area
If the residual BN is BN 10 or higher and the iron (Fe) content is between 200 mg/kg and
500 mg/kg, damage of the piston running system can occur.
•
Danger area
If the residual BN is less than BN 10 and/or the iron (Fe) content is more than 500 mg/kg,
excessive corrosion can occur. Thus the piston rings and cylinder liners can become quickly
worn. Also scuffing can occur.
X52
AA00-0000-00AAA-030G-A
Operation Manual
Cylinder oils
Winterthur Gas & Diesel Ltd.
- 457 -
Issue 002 2018-11