Table 1
Physico-chemical properties of oils used.
| Oil | Viscosity (cSt) at room temperature | Free Fatty Acid Value (%) |
| Olive | 47.85 | 0.4096 a |
| Sesame | 46.09 | 0.5632 b |
| Grape seeds | 36.36 | 0.2812 b |
| Coconut | 30.78 | 0.3072 c |
| Virgin coconut | 27.67 | 0.3584 c |
| Acetone | 0.37 | – |
| n-hexane | 0.49 | – |
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