Originally Posted by 
shack
				 
			Hmmmm, not sure that's a joke. 
Maybe a prank or lie? 
Maybe it was 29.5 litres per hd km?
A lot of the caravan forums I used to frequent had similar tall tales of 200 series towing a 3000kg van using 12.5.
Most of the local 200 series owners reckon they can often get it close to 12.5 L/100 without towing, maybe up to 13.5 L/100.
Somehow hooking a caravan on must put it into a super economical tow mode.
I guess if it makes you laugh, even in a scoffing kind of way it qualifies!!