PURPOSE: To selectively and surely lower a nozzle for a desired sort of oil by providing controllers which control oil feeding devices in such a manner that when identification codes of optical signals received by light receiving devices are all the same, the nozzle which supplies a sort of oil corresponding to the optical signal is lowered.

CONSTITUTION: Light receiving devices 7a1, 7a2, 7b1 and 7b2 are mounted on the ceiling of a gasoline station and respectively have definite light receivable areas 8, 9, 10 and 11 within which the receiving devices are able to receive optical signals. The light receivable areas partially overlap each other. When an optical signal containing an identification code 27 and an oil sort code 28 is generated from the overlapping light receiving area by a signal transmitter 16, the optical signal is received and detected by two or more light receiving devices at the same time. And, when the identification codes received are all the same, a controller 48, 58 or 59 controls an oil feed device 49, 60 or 61 so that a sort of oil corresponding to the oil sort code is supplied. Thereby, a feed reel 51 is put into action to extend an oil feed hose 50, and a nozzle 4a, 5a, 6a, 4b, 5b or 6b are lowered.