Research Article
Experimental Comparison of the Effect of Using Synthetic, Semi-Synthetic, and Mineral Engine Oil on Gasoline Engine Parts Wear
Table 8
Oil analysis results for viscosity, TBN, and flash point at the second and third stages.
| Oil statues | Fresh oil | Used oil |
| Stages | | Stage 2 @ variable load 2 | Stage 3 @ variable load 3 |
| Operation hours × 100 | 0 | 10 | 11 | 12 | 13 | 14 | 15 |
| Mineral oil | Viscosity@40°C (cSt) | 109.9 | 89.0 | 79.5 | 106.4 | 107.3 | 134.4 | 115.9 | Viscosity@100°C (cSt) | 13.8 | 13.3 | 12.5 | 13.6 | 15 | 16.42 | 14.64 | TBN (mg KOH/g oil) | 13.5 | 8.1 | 7.3 | 6.9 | 6.7 | 6.4 | 6.1 | Flash point (°C) | 220 | 180 | 164 | 210 | 210 | 222 | 222 |
| Semisynthetic oil | Viscosity@40°C (cSt) | 125.6 | 79.2 | 78.8 | 78.2 | 81.43 | 93.04 | 91.69 | Viscosity@100°C (cSt) | 15.2 | 12.3 | 12.2 | 11.6 | 12.01 | 13.32 | 13.1 | TBN (mg KOH/g oil) | 13.2 | 9.4 | 8.7 | 8.3 | 7.6 | 7.1 | 6.4 | Flash point (°C) | 250 | 190 | 205 | 196 | 178 | 212 | 218 |
| Synthetic oil | Viscosity@40°C (cSt) | 103.33 | 87.6 | 74.4 | 73.9 | 74.19 | 84.31 | 79.82 | Viscosity@100°C (cSt) | 15.46 | 14.9 | 13.2 | 12.1 | 9.98 | 12.28 | 12.9 | TBN (mg KOH/g oil) | 13.19 | 8.1 | 7.9 | 7.6 | 7.4 | 7.1 | 6.8 | Flash point (°C) | 228 | 194 | 180 | 192 | 172 | 206 | 212 |
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