Recent Posts by Mary Messuti

Understanding Particle Counting Methods

Understanding Particle Counting Methods Particle counting is considered by many to be one of the most important test for used oil analysis. Many problems can be quickly and easily identified by monitoring the number and size-distribution of particles in an oil sample. The ISO Code is the most common unit of reporting the number of…
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FTIR vs. RULER

FTIR vs. RULER Let's start by explaining the FTIR index numbers and then we’ll get in to the correlation between tests. The indexing numbers actually refer to a unit of measure. The unit is absorbance/0.1mm. However, this unit of measure is not one that is intuitive to most people so the results are referenced as…
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Sources of Silver

Sources of Silver Silver is a wear metal used as an overlay on some bearings, such as journal bearing for gas turbines or wrist pin bearings on EMD locomotive engines. Silver from these parts will increase disproportionately with iron. Zinc additized oils will accelerate the corrosion of silver in these applications, therefore the use of…
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Testing Lubricants for Compatibility

Testing Lubricants for Compatibility TestOil offers lubricant compatibility analysis using ASTM D 7155 as the guideline for compatibility testing. If test results show signs of minor incompatibility you must evaluate the potential impact. Do the mixtures show a decreased ability to resist oxidation? Will this result in a shortened lubricant life and therefore increased cost…
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TestOil Named Weatherhead 100 Winner, Again!

TestOil Named Weatherhead 100 Winner, Again! It is an honor to be named one of the fastest growing companies in Northeast Ohio and we are proud to be included on this list alongside many other great companies. This is the sixth consecutive year that TestOil has made the list. The Weatherhead 100 was established to…
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Sources of Copper

Sources of Copper Copper usually appears in fluid samples as a wear metal, most often arising from brass or bronze components. Whether gears, bearing cages, guides, bushings, or piston shoes, brass and bronze parts are alloys of copper lead, tin, and/or zinc. Being an alloy, the wear metals from these parts will remain proportional as…
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