Originally Posted by 
JDNSW
				 
			In, I think, 1964, I was at our company's yard in Roma. We had an above ground 500 gallon tank of petrol. This enabled you to fill up by gravity. 
One of the blokes was filling a drum in the back of the Holden ute.  So he did not have to hold the hose, he jammed the handpiece on with the lid of the drum. 
I was in the office about 50m away, when the mechanic, who was in the workshop, a lot closer, had his attention drawn to the trickling sound that became apparent. It seems that an EK Holden ute does not hold 500 gallons of petrol, without it flowing over the tailgate........(but is sealed remarkably well).