How much oil to achieve 50 to 1 ratio in a gallon of gas?

To achieve a 50:1 oil-to-gas ratio in a gallon of gas, you would need 2.6 ounces of oil. This is calculated by dividing the total ounces in a gallon (128 ounces) by the ratio (50). Therefore, for every gallon of gas, you should mix in approximately 2.6 ounces of oil.