Research Article
The Application of Response Surface Methodology in the Investigation of the Tribological Behavior of Palm Cooking Oil Blended in Engine Oil
Table 3
Design values obtained from a Minitab.
| Experiment | Speed (rev/min) | Load (kg) | Volume concentration (%) |
| 1 | 300 | 5.5 | 10 | 2 | 300 | 2 | 5 | 3 | 200 | 9 | 5 | 4 | 250 | 2 | 10 | 5 | 250 | 5.5 | 5 | 6 | 200 | 5.5 | 10 | 7 | 250 | 9 | 0 | 8 | 250 | 2 | 0 | 9 | 300 | 5.5 | 0 | 10 | 300 | 9 | 5 | 11 | 250 | 5.5 | 5 | 12 | 250 | 9 | 10 | 13 | 200 | 2 | 5 | 14 | 200 | 5.5 | 0 | 15 | 250 | 5.5 | 5 |
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