SWEPCO 306 Supreme Formula Engine Oil

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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. Its multi-grade all-season formula means you can lubricate your entire fleet, even new engine designs, year-round, with SWEPCO 306. It provides outstanding wear control, service life, cleanliness, thermal stability and corrosion resistance for most diesel and gasoline engines. SWEPCO 306 is formulated from the very finest high VI 100% solvent refined paraffinic base stocks available and the most advanced additive chemistry, including DIMONYL®, SWEPCO’s proprietary anti-wear additive. Easier cold weather starting with less wear are additional benefits associated with SWEPCO multi-graded weights. Because SWEPCO Engine Oil provides superior performance for a longer period of time, SWEPCO 306 saves money through overall reduced lubrication costs, including fuel conservation, reduction of waste, reduced maintenance costs and extension of equipment and oil life. 


  • Contains DIMONYL®
  • High VI solvent extracted paraffinic base stocks
  • Exceeds most major engine manufacturers recommendations
  • Contains detergent/dispersants
  • Oxidation inhibitors
  • Rust and corrosion inhibitors
  • Anti-foam inhibitor
  • Pour depressant
  • Anti-wear inhibitors

  • $205.44


  • Long drain service up to 100,000 miles or 600 hours with LOA Program
  • Superior friction reduction, cooler operating temperatures, reduced friction and drag, improved fuel economy and lower octane fuel needed
  • Exceeds most engine manufacturers specifications and recommendations, so it's one oil for most applications
  • Multi-grade weights give more versatility-one oil can be used for many different viscosity requirements from engine manufacturers or from climatic conditions
  • Multi-grades offer better fuel economy or energy savings than single grades

    • SKU
  • Weight
    5w30, 10w30, 15w40, 20w50
  • Quantity
    Case (24) Quarts, Case (6) 1 Gallon Containers, Keg, Drum, Bulk Bin
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