Research Article
Experimental Comparison of the Effect of Using Synthetic, Semi-Synthetic, and Mineral Engine Oil on Gasoline Engine Parts Wear
Table 2
Precautionary values adopted criterion for the validity of oil.
| Specifications | Allowed precautionary limits |
| Kinematic viscosity at two degrees: 40 and 100°C | ±35% | Total base number (TBN) | <2 | Iron content | <200 ppm | Copper content | <40 ppm | Chromium content | <20 ppm |
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