Monitoring of the Physical and Chemical Properties of a Gasoline Engine Oil during Its Usage.

On the other hand, the obtained data indicate that upon the continuous usage of the oil and at higher kilometers, the concentration of some of the elements decreases continuously, mean while an increasing trend is observed for other elements.

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Thus, a decreasing trend is observed for the elements no. 1–8 ( Table 1 ) and an increasing trend exists for other elements.

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