PREMIUM PRODUCTS Ultra-S™ base oils are made in Onsan, South Korea at S-Oil Corporation’s world-class refining complex. These premium products are produced in a newly expanded plant using an advanced hydrocracking and hydroisomerization process. The resulting API Group III base oils are fully saturated and extremely pure, with very low volatility and high viscosity index.
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PREMIUM PERFORMANCE The exceptional characteristics of Ultra-S™ base oils make them your solution for the most demanding lubricant formulations, including those that require performance approaching that of synthetic polyalphaolefins. With viscosity indices of 120 to 130, very low volatility, and excellent cold temperature and oxidation properties, they are ideal base stocks for meeting the most stringent new engine oil specifications now and in the future. An optimized blend of Ultra-S™ Group III and Pure Performance® Group II base oils can lower engine oil additive treat cost significantly, providing a net formulation cost advantage without sacrificing premier performance. |
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Due to their exceptional chemical purity, Ultra-S™ base oils are extremely stable and highly resistant to oxidation. This makes them ideal in applications requiring longer service life under high temperature operating conditions. They are the logical choice for the next generations of premium engine oils, extended-drain transmission and gear fluids, severe duty hydraulic fluids, and long-life turbine oils.
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PREMIUM SUPPORT We’re here to help you maximize the performance of your lubricants with Ultra-S™ Group III base oils. Let us put the extensive technical experience of our lubrication scientists to work for you. And when it comes to supplying your needs, seasoned ConocoPhillips professionals will ensure timely, reliable product delivery.

STATE-OF-THE-ART HYDROPROCESSING TECHNOLOGY. Using state-of-the-art all-hydroprocessed technology, S-Oil converts crude oil molecules into extremely pure colorless Ultra-S products which have a very high viscosity index and are virtually free of aromatics, polar compounds, and sulfur. The result is a premium Group III base oil without the impurities and characteristics that limit the performance of other base oils.

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Here are the steps in the Ultra-S production process:
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HYDROCRACKING PROCESS
Using VGO (Vacuum Gas Oil) as the primary feedstock, a severe hydrocracking process removes impurities and saturates virtually all of the aromatics to produce highly paraffinic lube oil feedstocks with very high VI.
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SELECTIVE CATALYTIC DEWAXING PROCESS
A catalyst selectively isomerizes normal paraffins into branched molecules. These isoparaffins produce superior lubricating base oils.
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HYDROFINISHING PROCESS
The dewaxed oil is purified further by removing any residual aromatics and impurities such as sulfur and nitrogen. The result is a colorless and extremely pure finished base oil. |
For more information on Ultra-S Base Oils contact us at 1-800-527-3236 or 1-888-877-3170