How much gas and oil for 15 to 1 mix?

To create a 15:1 fuel mix, you will need 15 parts gasoline to 1 part oil. For example, if you're using 1 gallon of oil, you would mix it with 15 gallons of gasoline. If you're measuring in ounces, for every 1 ounce of oil, you would mix it with 15 ounces of gasoline. Always ensure to mix thoroughly for optimal engine performance.