My father has owned his 1970 Dodge pickup sense it was new. He went down to the Arco gas station, in Salem Oregon, on the corner of Lancaster and Alborn. As my father watch the gas attendant putt gasoline in to his truck he thought that there was something wrong when the attendant put 20 gallons of gas into the seat tank when the gas gage read a quarter of a tank. With this event my father watch closer. The attendant then fill the sattle tank.
Keep mind that my father has owned this truck sense it was new. My father bout and hand the 15 gallon sattle tanks installed in 1971. The attendant putt 20 gallons into the sattle tank. At the maximum the sattle tank will holed 16 gallons.