Fluid Analysis SOS

S•O•S Fluid Analysis

The following S•O•S Fluid Analysis tests are used to analyze the fluids obtained from your equipment

The ability of a fluid to maintain appropriate film thickness at high temperatures.

Particle Count
A test for the presence of contaminants that may increase wear. Usually expressed in an ISO code.

A normal process that occurs in oil as it ages and combines with oxygen molecules. Oxidation causes increased viscosity, acid formation, and deposits.

As sulpher from fuel combines with water during the combustion process, sulphuric acid is formed. Engine oil is designed to neutralize this acid. This process of neutralizing sulphuric acid is measured as sulfation. If allowed to reach unacceptable levels the lubricant will be degraded and corrosion to internal parts can occur.

The insoluble residue of partially burned fuel. Soot is abrasive and causes wear. Held in suspension by additives in engine oil its adverse effects are minimized. However excessive levels will eventually overpower the additives. When this occurs, the soot will drop out of suspension and wear will accelerate.

Fuel Dilution
If fuel dilution is left unchecked, low viscosity can occur. If the oil film does not have adequate thickness, moving parts may experience direct contact that could result in scuffing or seizure.

Water can be the result of condensation, leaks, pressure washing, or other means. When water is present corrosive wear and rusting can occur.

Engine oil can become contaminated with coolant due to leaks from oil cooler cores, internal coolant passages, and cylinder head gaskets. Other compartments using coolant to oil coolers can become contaminated when these coolers leak. Coolant contamination can produce sludge and wear.

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