Thermo-physical properties of selected oil samples as predictor of marine engines life span

Abstract

The break down of hydrodynamic regime of lubricants especially at higher operating temperature promotes direct metal-to-metal contact between surfaces. This often results in wear and tear, overheating and fatigue on the sliding surfaces of engines. This paper determines the actual viscosities of six oil samples (Mobil oil, Abro oil, Con oil, Tonimas oil, Oando oil and Total oil) using their coefficient of viscosities and specific heat capacities obtained in the laboratory. The results indicate that Mobil oil is the most appropriate for oil marine engines; closely followed by Tonimas oil, and Total oil. The results also reveal that Con Oil, Oando Oil and Abro Oil have low viscosities at higher temperatures. This thermo-physical property may render these oils very unstable for marine engines, especially for international voyage.