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Tag Archives: Acid Number

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Setting Acid Number and Base Number Limits

Setting Acid Number and Base Number Limits
Setting Acid Number and Base Number Limits There is a rule-of-thumb that oil should be condemned at double its new oil Acid Number, or at half of its new oil Base Number. The problem with this rule is that is has too many exceptions to be valid. Rather than identify the valid instances, it is…
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Gauging Acidity: Acid Number

Gauging Acidity: Acid Number
Gauging Acidity: Acid Number Acid Number (AN) is an indicator of oil serviceability.  It is useful in monitoring acid build-up in oils due to the depletion of antioxidants. Oil oxidation causes acidic byproducts to form. High acid levels can indicate excessive oil oxidation or depletion of the oil additives and can lead to corrosion of…
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