Portable Generator Fuel Choices
By Robert Jent
Portable generators run on different types of fossil fuels: natural gas, propane, diesel or gasoline. The diesel generator is the most fuel-efficient. A gallon of diesel fuel will last two to three times as long as gasoline. Also, gasoline generators have to be cooled down before you can refuel which isn’t the case with diesel. Diesel generators are designed to run continuously for hours. The engines are cooled by water, very durable and more dependable than other kinds of generators and have the longest engine life. They use direct injection and are much less likely to start a fire as they don’t have spark plugs. Diesel is the least flammable of all the fuels making it safer to store. However, diesel generators are noisy, smokey and hard to start in cold weather requiring heaters. Also, diesel fuel is more expensive than gasoline in many places. Diesel generators are usually the most expensive type and normally used for larger, commercial applications.