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High performance EP gear oil with Synslide designed to smoothly lubricate gears under virtually all conditions, including sudden shock. Royal Purple’s best-selling EP synthetic gear oil, Synergy’s natural solvency cleans and protects gear boxes while offering better protection than other extreme-pressure oils.
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Severe service gear and bearing oil, with Synslide. Has all of the advantages of Synergy® but is recommended where heavy loads, shock loads, low operating speeds and/or high operating temperatures are encountered.

