Amalie Elixir Full-Synthetic Motor Oils are the 21st Century oils for tough 21st Century work - protecting your engine better. Synthetic Oils offer the ultimate in engine protection for both gasoline and diesel engines. Formulated with state-of-the-art additives and 100 percent synthetic base stocks, Amalie Elixir Full- Synthetic Motor Oil has been carefully developed to meet the most current API Service Classification.