Kimi spun and lost his rear wing when he hit the barriers, I'm surprised the car wasn't that badly damaged. He also mentioned that his car was experiencing 'electrical problems' early in the morning.
'Donskar', engines used on Fridays do not count towards the regulations stating that 'qualy and race' engines must last two consecutive events. So if the engine is damaged there will not be a penalty. Besides, oil could be from the gearbox, and not necessarily from the engine.
eDiT:
Does anyone know the reason for this sidewall design? Thanks in advance. But do you think its testing for next seasons markings for the different compounds?