Operation
0750−1/A1
Winterthur Gas & Diesel Ltd.
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Table 3: Particle Count and Size Classes
Number of particles per 100 ml
More Than Up To and Includes Class
250 000 000 − Less than 28
130 000 000 250 000 000 28
64 000 000 130 000 000 27
32 000 000 64 000 000 26
16 000 000 32 000 000 25
8 000 000 16 000 000 24
4 000 000 8 000 000 23
2 000 000 4 000 000 22
1 000 000 2 000 000 21
More than 6 m
maximum
500 000
1 000 000 20
250 000 500 000 19
130 000 250 000 18
More than 14 m
maximum
64 000
130 000 17
32 000 64 000 16
16 000 32 000 15
8 000 16 000 14
4 000 8 000 13
2 000 4 000 12
1 000 2 000 11
500 1 000 10
250 500 9
130 250 8
64 130 7
32 64 6
16 32 5
8 16 4
4 8 3
2 4 2
1 2 1
0 1 0
The ISO 4406 particle count system operates with three size classes related to a
100 ml oil sample, which are:
D R
6
= number of particles equal to or larger than 6 m
D R
14
= number of particles equal to or larger than 14 m.
2016−11
Lubricating Oils
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