TY - JOUR AB - The more frequently an engine oil is changed, the more the overhaul life of the engine is extended but with an increase in the cost both of the oil and of the oil drain services. If engine oil is changed less frequently the associated costs will decrease. In order to find the optimum drain interval, it is necessary to establish the relationship between the cost of the oil and oil drain services and the cost of more frequent overhauls. Presents an investigation into the degradation of a proprietary lubricant marketed in Turkey, and the wear rate of a petrol engine driven in urban traffic. Lubricant samples were examined approximately every 2,000km for deterioration of the lubricant and evidence of wear of the engine components. From the experimental results, determines the optimum oil drain period of the engine. VL - 49 IS - 3 SN - 0036-8792 DO - 10.1108/00368799710165747 UR - https://doi.org/10.1108/00368799710165747 AU - Kaleli Hakan AU - Yavasliol Irfan PY - 1997 Y1 - 1997/01/01 TI - Oil ageing ‐ drain period in a petrol engine T2 - Industrial Lubrication and Tribology PB - MCB UP Ltd SP - 120 EP - 126 Y2 - 2024/04/20 ER -