A refueling system for supplying fuel to at least one piece of fracturing equipment. The refueling system can have a main fuel source and at least one pressurization unit. The pressurization unit can have an optional pump, a motor, a motor fuel source, a supply coupling device and a return coupling device. The refueling system can have sensors in the one or more supply fuel lines and in the one or more return fuel lines for receiving flow rate information and pressure information, wherein the flow rate information and pressure information are compared to preset limits and a message can be transmitted when the flow rate information and pressure information falls below or exceeds the preset limits to adjust rates of operation.