An improper oil and gas mixture in your 2-stroke engines can cause damage. By using the Bass Pro Shops® 2-Stroke Marine Engine Gas/Oil Mixing Bottle, you'll ensure sure all your oil-to-gas ratios are perfect, and your engines will keep running smoothly. In order to use correctly, fill up your gas can and note the exact amount of gas you've added. Now, look at your Bass Pro Shops 2-Stroke Marine Engine Gas/Oil Mixing Bottle and notice it has many marks that denote the most common gas-to-oil ratios (100:1, 50:1, 24: 1). Find your correct ratio line on the side of the see-through, 32-oz. bottle and fill it with the exact amount of oil your gas amount needs. Finally, add the oil to the gas can. Bottle displays level marks for both gallons and liter measurements. Wide-mouth opening makes usage easy. Manufacturer model #: 52615. Ensures all your oil-to-gas ratios and your engines running smoothly. Helps keep marine engines running smoothly. Level marks show gas-to-oil ratios. See-through, 32-oz. bottle. Gallons and liter measurements. Wide-mouth opening.