Evolve’s EvoSyn® 15W40 CK4 Non-Petroleum, carbon negative engine oil meets and exceeds all manufacturer specifications. Registered with the USDA Bio Preferred Program this engine oil uses high performance renewable hydrocarbons made from 100% Bio Based content also meeting the stringent ECO Label European standards.  Also available in 10W30 FA4 viscosity.  This High-Performance Heavy Duty Engine Oil offers its users significant improvements in fuel economy, extended drain intervals and reductions in diesel particulate filter expense. Tested in the US Military and some of the trucking industries largest fleets now reaching 200,000 miles each and 800,000 collective miles without need for an oil change.