Determine what fuel ratio your equipment requires. There are three common gasoline to oil mix ratios: 32-to-1, 40-to-1 and 50-to-1. Read your owner's manual to determine the proper ratio for your appliance.
Measure the proper amount of oil by pouring it into a measuring cup. Place a funnel into a 1 gallon gasoline container and pour the oil into the funnel. It is easiest to use a 1 gallon gasoline can so after you pour in the right amount of oil you just fill the rest of the container with gasoline.
Fill the container with gasoline, close the caps and shake well. It is now ready to use in your appliance.