According to the Tech Specs here on this site the 78 750 K Fuel Capacity is
5.1 US gal, 4.3 Imp.gal (19.5 liter) and the Fuel Reserve Capacity 1.1 US gal, 0.9 Imp.
(gal 4.0 liter).
For the sake of sounding stupid, even though my father told me there is no such thing as a stupid question.
Does this tank hold a total of 23.5 Liters or is the 4 L reserve included in the 19.5 Liters?
Cheers