(Original post by Maynia)
At the moment they do. From 2003, final qualifying was run with race fuel, but since in-race refuelling was (re-)banned for 2010 they run feather-light in Q3 and fuel for the whole race afterwards.
Yeah, that's out of date. This is reg 29 from the 2012 sporting regulations, in its entirety:
29.1 a) Refuelling is only permitted in the team’s designated garages.
b) No car may be refuelled after it has left the pit lane to start the first reconnaissance lap permitted under Article 38.1.
c) Fuel may not be added to nor removed from a car during a race.
29.2 No car may be refuelled, nor may fuel be removed from a car, at a rate greater than 0.8 litres per second.
29.3 The driver may remain in his car throughout refuelling but the engine must be stopped.
29.4 Each competitor must ensure that an assistant equipped with a suitable fire extinguisher of adequate capacity is beside the car throughout all refuelling operations.