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Exceeds API CI-4/SL Requirements For Superior Soot Handling & Improved Performance In New EGR Engine DesignsManufacturer Approved for Extended Drain Service SWEPCO 306 Supreme Formula Engine Oil is a premium quality, multi-purpose, extended service engine oil specially formulated to provide superior performance under the most demanding operating conditions. It exceeds the requirements of most over-the-road major diesel and gasoline engines manufactured prior to 2007 and off-road diesel engines m...

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