Obtaining more efficiency from the energy use, doing what we do, had become a priority for the architects. And it is, specially, a public priority that concern to the architects. But, how much is a litre of oil? The Oil Banquet, is an experience that pretended to show the collective energy used in our every day. Organization. After a conference, that took place in a school room, some big letters, with the text ‘eat one oil litter’, made up with black balloons (2.5m tall) were placed. Environmental music was played by an eclectic band dress up with oil colour. A few minutes afterwards, from a secret room, a bunch of waitress with black t-shirts with the text ‘this plate contains an oil litre’ came out. Each plate contained canapes, which in its production, (from the crop and breeding until the final elaboration) and transportation had required the used of an oil litre. Some plates (the ones with ham for example) were very small but other (the ones with tomatoes) ere larger. Allowing the visualization of which of the different products was more energy efficient. In addition, each canapé had a stick with a flag that informed the amount of energy used during its production. The banquet attendants could exchange the flags for pins that had written ‘’I eat 200 gr. Of oil during the architectural week’ or ‘I eat 2 kg. of oil during the architectural week’. The party finished with the launch, in the entrance stairs on ETSAM, of the balloon letters into the sky and the waitress disappearance in bicycle and skates while the band played the oil litre song.