GotQuestions? Lubricants

Q. What are the benefits of a semi-synthetic oil?

August 7, 2013

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A. Semi-synthetic oil means that the finished lubricant contains both conventional- and synthetic-based oils. The amount of synthetic component can vary from product to product with no set rule as to how much synthetic base oil is used.

As a general rule, semi-synthetic oils can improve oxidation stability, have longer service life and in some cases perform more favorably when biodiesel fuels are used. Fleet managers need to consult with their suppliers to determine if a semi-synthetic oil can offer additional advantages for their equipment and operating conditions.

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Author Bio

Mark Betner

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Heavy Duty Lubricants Manager

Mark Betner boasts 35 years of experience in the lubricants business. As the Heavy Duty Product Manager for CITGO Lubricants he is responsible for initiating and implementing the marketing of new products and human development programs and oversees communications with the media, trade shows and consumer education.

Prior to this, he was a field sales manager and technical training administrator at an independent lubricant company specializing in heavy equipment lubrication.

Mark earned a master’s and bachelor’s degree in both chemistry and biology from Indiana University. He holds a certification from the Society of Tribologists and Lubrication Engineers and is a member of the Truck Maintenance Council.


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