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What is ester oil?

“What is ester oil and how is it different than conventional oil?”

Randy Drier, Atlanta, Georgia

Answer

Ester oil is synthetic base oil that has been chemically synthesized. Typically ester oils are used in passenger car air-conditioning compressors, refrigerators and other industrial applications. Esters are one of the classes of synthetics that have been used in Mobil 1™ oils  as well. Esters are stable molecules, provide good solvency, and provide very good low-temperature and high-temperature performance in engine oils.
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