 Considering the distance it had traveled, the fuel consumption of SMART-1 was quite economical: the entire mission required just 62 litres (13 gallons) of liquid Xenon to fuel it.
<clarity>  Considering the distance it had traveled, the fuel consumption of SMART-1 was quite economical: the entire mission required just 62 litres (13 gallons) of liquid Xenon to fuel it.
 Considering the distance it had traveled, the fuel consumption of SMART-1 was quite economical: the entire mission required just 62 litres (13 gallons) of liquid to fuel it.