Table 7 Concentration of additives in the tested oils.
Operating condition | Sample code | Overall mileage [km] | Mileage on oil [km] | Zn [ppm] | P [ppm] | S [ppm] | Ca [ppm] | Mo [ppm] |
|---|---|---|---|---|---|---|---|---|
x̅ ± SD | x̅ ± SD | x̅ ± SD | x̅ ± SD | x̅ ± SD | ||||
New oil | OP | – | – | 1376 ± 3 | 960 ± 31 | 3806 ± 14 | 4305 ± 15 | 379 ± 24 |
City | OP_2384 | 868,964 | 48,864 | 1077 ± 1 | 759 ± 26 | 2809 ± 34 | 2758 ± 20 | 417 ± 21 |
OP_2414 | 704,454 | 66,238 | 1405 ± 1 | 907 ± 14 | 3594 ± 23 | 4614 ± 17 | 387 ± 11 | |
OP_2378 | 874,729 | 70,600 | 1544 ± 6 | 1001 ± 13 | 3616 ± 9 | 5072 ± 36 | 366 ± 9 | |
OP_2420 | 77,240 | 77,240 | 1579 ± 0 | 1116 ± 37 | 3570 ± 17 | 4850 ± 25 | 419 ± 11 | |
OP_2400 | 130,719 | 80,984 | 1576 ± 6 | 1082 ± 24 | 3504 ± 26 | 5073 ± 20 | 384 ± 22 |
