At my workplace-the transmitter site-the same fuel oil used for the generator(Cat 3816)is used for the boilers.The plant uses about 15,000 gal per year-so no worry of it going stale.Our fuel is stored in two above ground concrete tanks.and a fuel pump is also available to fuel deisel powered company vehicles-truck,tractor and two "Gator" type utility vehicles-all run on deisel.-and a forklift.A gaspump and gasolene tank are here ttoo,for the company cars.