There is a deal where if you rent a car with Avis for 3 days you can receive 18,700 Avios. The rental has to begin on 8, 9 or 10 December, must be minimum 3 days long and be for at least a group C car.

http://www.avisiberia.es/avisonline/...rs,18000_avios

I really have to thank Raffles for this, over at headforpoints.