I am fortunate in that I live only about 2 hour's drive from the S&W factory. Every year someone from our club drives up and brings back fuel for our members. Stan (the owner) will blend fuel to your specifications and is a really nice guy. He told me that the gallon jugs and boxes cost him plenty. So I can see how buying fuel in 55 gal drums could be a big savings. He would save the labor of having to fill, label and pack each gallon and the cost of the bottles and boxes.