viscosity comparison test of engine oils

Diesel readings of around 0.5% can often be reduced by controlling excessive idling times, however any reading over 1% should be acted on as this will cause a significant viscosity drop by around 20% or more. The lower the viscosity, the weaker the film strength. NEVER IGNORE A POSITIVE WATER TEST, IT WILL EVENTUALLY LEAD TO COSTLY REPAIRS.ĭiesel Dilution Test Diesel dilution is also a common cause of engine failure as its effect on oil is that it causes viscosity to drop dramatically, the more diesel, the lower the viscosity.

Engine oils usually operate at high temperatures which will evaporate any condensation entering, hence any water in engine oil at any level usually indicates internal leaking. In engines, water is more damaging as the sulphurs combine with water and oxygen to cause the formation of acids, which literally eat away at the bearings. Change the oil, identify and rectify the source of the contamination. If your oil analysis indicates that your system has water contamination, do not under estimate the damage it can cause. IT IS CAPABLE OF TEARING METAL OUT, DESTROYING SURFACE INTEGRITY AND EVENTUALLY LEADING TO COMPOMENT FAILURE. It is one of the most common causes of failure as it causes the oil to degrade, build up acid or base and under load, turns to steam with an expansion factor of up to 2,000 times, which causes mini nuclear explosions on the loaded zone of the surface. Oil Analysis The Tests Water Test Water is one of those contaminants that will sneak into your system unnoticed, usually by way of condensation, entry when hosing down or internal coolers leaking.

Viscosity comparison test of engine oils