Page 57 - WHITE BOOK

Appendix D
Oil and Wear Debris Analysis Data
Oil CFR. Fuel
Engine Mileage (km)
Oil Viscosity TAN Mileage at 100C (mg KOH/g)
Water (ppm)
Fe Ag 7.8 0
Al Cr 2.2 0.4
Cu 0.8
Sn Si 0 4.7
B 4.6
Instant Lubricant Test
Comments
The fluid viscosity is higher than expected for
Summary
Only 1 sample received from that CFR.
Spec.
5W20 41273 Gas
5W20 45880 Gas
12.9 0
2.8 0.4
6.8
0 5.3
4.2
Oil and oil-wetted components in good condition. Suspected that the sample was taken too long after engine shutdown and that heavier wear debris settled and were not picked up during sampling. This would explain the much lower metal content than next sample within the cycle. The appearance of high copper (Cu) indicates worn bearings and bushings. Viscosity increased
5W20 45880 Gas
60158
17179 10.99 3.66
30.5 0.1
8.1 1.5
25.8
0 11.1
2.8
Good
5W20 45880 Gas
66562
6404 11.1 4
34 0
9 2
30
0 12
3
Good
5W20 45880 Gas 5W20 45880 Gas
68258 75700
8100 10.3 4.045 15542 8.3 4.9
35 0 19.4 0
9 2 4.6 0.9
29 9.3
10 14 0 11.5
9 1.1
OK, Plan change
Suspect wrong usage information provided.
Sign of worn bearings and bushings confirm with the presence of high copper (Cu) and tin (Sn). Oil viscosity and acidity (TAN) are acceptable.
Wear metals levels dropped below warning levels. Viscosity decreased significantly and the oil acidity (TAN) increased to the warning level. Suspected that the sample was taken too long after engine shutdown and that heavier wear debris settled and were not picked up during sampling. Oil change occurred. End of 2nd cycle
Oil and oil-wetted components in good condition. Low viscosity is possibly caused by a batch of new oil with lower viscosity.
5W20 45880 Gas
85179
9479 7.2 1.75
1710
10.3 0
2.6 0.4
4
0 7.1
0.6
Good
D-3
Type
(km)
75844 42979
0 13.9 3.2 0 9.18 2.7
Good Good
5W20 oil. It is suspected that the oil type may have been 5W30 or 10W30.
1216
Good
slightly exceeding the prescribed limit.
oil samples from the cycle. The oil was supposedly replaced. End of 1st cycle
The wear metals levels and oil properties are not consistent with recently changed oil. Levels of copper (Cu) and iron (Fe), viscosity and TAN have increased from the pre-oil change values.
Missing 2
High Cu level is evidence of worn bearings and bushings. The presence of copper (Cu) is expected to promote oil acidity build up. Variations in the viscosity of new oil are most likely the cause of the apparent exceedances. The oil used during the first cycle had a high initial viscosity where the oil used in the 3rd cycle had low initial viscosity. Incoherence between oil properties and wear metal contents and apparent oil changes may be an indication of wrong usage information. 1 cycle completed