| Coefficient | Oil loss (%) | Acid value | Peroxide value | Colour |
| b0 | 10.370 | 27.500*** | 1.500* | 0.300 |
| b1 | 0.361 | 0.000 | 0.156 | 0.00 |
| b2 | −1.089 | −0.303 | 0.189 | 0.00 |
| b3 | 3.125** | 0.000 | −5.110 | −0.12* |
| b12 | 2.870 | -0.808 | 0.000 | −0.12 |
| b13 | 1.067 | 0.280 | −0.153 | 0.05 |
| b23 | −0.376 | −1.461 | −0.265 | −0.02 |
| b11 | −2.135 | −0.500 | 0.375 | −0.05 |
| b22 | 0.142 | −2.033 | −0.125 | −0.12 |
| b33 | −1.568 | −3.771* | 0.063 | −0.11 |
| R2 | 0.96 | 0.87 | 0.60 | 0.85 |
| AAD | 4.65 | 1.51 | 14.72 | 3.73 |