Today I'm going to show you how to prime an oil boiler after you run out of fuel. It's an easy job that anyone can do with a few simple tools. Most oil delivery companies are going to charge an extra fee for same day oil delivery and another fee to restart (prime) your boiler after you run out of oil. You can save money by adding five gallon of diesel fuel to your oil tank and restarting your boiler yourself. This five gallons of fuel should last at least a few days while you wait for your delivery. Most people will run out of fuel on occasion and this fix will save you money and return heat and hot water to your home with minimal effort. Let's get started.