Abstract: A fuel is conditioned in a fuel supply system for more efficient combustion in a combustion chamber. The conditioning system includes a plurality of vessels, each defining a fuel chamber for fuel conditioning, at least one fuel dispersing nozzle mounted for discharge into the fuel chamber, at least one gas inlet port, a gas outlet port with a gate valve and a pressure reducer mounted thereon. A low level sensor registers a low level of conditioned fuel in the fuel chamber. A gas source feeds a gas to the vessels wherein the gas is dissolved in the liquid fuel for forming a liquid/gas fuel solution. A gas delivery and gas pressure control system with flow-directional valves and gas pressure regulators supply gas and maintain a relatively high, first gas pressure P1 and a relatively low, second gas pressure P2.