Abstract: In one embodiment, the high viscosity fluid to be metered and dispensed is oil that is pumped at a low flow rate, in the range of one quart per minute. A positive displacement pump obtains the oil from a tank and pumps the oil to an air eliminator. A volumetric meter is downstream of the air eliminator and receives the oil therefrom via a hydraulic system line. An electronic detector/pulser produces signals based upon the flow of oil through the meter. In a working embodiment, 1,000 pulses represent one quart of oil. These pulses are applied to a controller which includes an adjustable calibration circuit that corrects for system characteristics in order to dispense a "legal" quart of oil to a customer. The controller has an input device and a comparator that enables the controller, after being programmed, to dispense, for example, two quarts of oil.