The biggest part of oil use in the USA is in transportation and this is where the savings have to come from. Americans were driving twice as many miles a day as they did in the last oil crisis in 1979. So a lot of the savings are to be expected in fewer miles driven as prices rise. The other saving will have to come from more efficient cars with better fuel efficiency and use of alternative fuels. Americans consumed 9.1 million barrels a day of gsoline in April 2008, two million barrels a day more than in April 1979. In 1979 of every 100 barrels of oil produced globally 29 wnet into American transportation, homes and power plants. This figure is only slightly down to 24 barrels so there is much room for significant reduction in a world economy where new technology can be accessed and the Japanese model for conservation shows further gains have already been made in other countries. So Chinese and Indian demand and demand in other newly developing countries will play a part but the US and Europe by showing the way in new technologies that can be adapted for use to reduce overall emissions and to get more out of each barrel of oil would find that these technologies are attractive to China and India in stretching a limited resource for increasing numbers of users in large demographics. Figures from Cambridge Energy Associates....