The Obama administration wants to reduce oil consumption, increase renewable energy supplies and cut carbon dioxide emissions in the most ambitious transformation of energy policy in a generation.

But the world’s oil giants are not convinced that it will work. Even as Washington goes into a frenzy over energy, many of the oil companies are staying on the sidelines, balking at investing in new technologies favored by the president, or even straying from commitments they had already made.

Royal Dutch Shell said last month that it would freeze its research and investments in wind, solar and hydrogen power, and focus its alternative energy efforts on biofuels. The company had already sold much of its solar business and pulled out of a project last year to build the largest offshore wind farm, near London.

BP, a company that has spent nine years saying it was moving “beyond petroleum,” has been getting back to petroleum since 2007, paring back its renewable program. And American oil companies, which all along have been more skeptical of alternative energy than their European counterparts, are studiously ignoring the new messages coming from Washington.