The economies of many big oil-exporting countries are growing so fast that their need for energy within their borders is crimping how much they can sell abroad, adding new strains to the global oil market.

Experts say the sharp growth, if it continues, means several of the world’s most important suppliers may need to start importing oil within a decade to power all the new cars, houses and businesses they are buying and creating with their oil wealth.

Indonesia has already made this flip. By some projections, the same thing could happen within five years to Mexico, the No. 2 source of foreign oil for the United States, and soon after that to Iran, the world’s fourth-largest exporter. In some cases, the governments of these countries subsidize gasoline heavily for their citizens, selling it for as little as 7 cents a gallon, a practice that industry experts say fosters wasteful habits.

“It is a very serious threat that a lot of major exporters that we count on today for international oil supply are no longer going to be net exporters any more in 5 to 10 years,” said Amy Myers Jaffe, an oil analyst at Rice University.