Prime Line 7-06615 Premium Smokeless 2-Cycle Oil, 40:1 Mix Ratio 3.2 oz. Bottle 1 Bottle to 1 Gallon of Gasoline Yields a 40:1 Mix Semi-Synthetic Features Virtually No Smoke or Odor Specifically Formulated to Provide Superior Performance in Chainsaws, String Trimmers; Blowers; Lawn Mowers; and Other Air Cooled 2-Cycle Engines 3.2 oz. Bottle Semi-Synthetic Features Virtually No Smoke or Odor Specifically Formulated to Provide Superior Performance in Chainsaws, String Trimmers; Blowers; Lawn Mowers; and Other Air Cooled 2-Cycle Engines