An oxy-oil burner with monitoring, including an oil lance having an oil nozzle at a tip end, and an oil inlet distal from the tip end; a primary oxidant passage surrounding the oil lance; an oil nozzle temperature sensor positioned in the oil nozzle at the tip end of the oil lance; an oil inlet temperature sensor positioned near the oil inlet; an oil pressure sensor positioned near the oil inlet passage; and an instrument enclosure for receiving data from the sensors; wherein the oil nozzle temperature, the oil supply temperature, and the oil supply pressure in combination are usable to indicate an abnormal burner condition.