Did OPEC members always cooperate perfectly during the embargo?

No. Cartel discipline was imperfect even during the embargo, and the incentive for individual members to produce beyond their quota once prices spiked was a persistent tension that shaped OPEC's internal politics for years afterward.

Why did the embargo change US policy for decades, not just for its six-month duration?

The embargo revealed that dependency on a small group of foreign producers was a durable strategic vulnerability, not a one-time event, which is why the policy response, strategic reserves and fuel efficiency standards, was built to persist indefinitely rather than to address 1973 alone.

Is the 55 mile per hour speed limit still connected to the embargo?

No. Congress repealed the national speed limit mandate in the 1990s, though it began in the 1970s partly as a fuel conservation response to the energy shocks of that decade.

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economics · 1973 to 1974

The 1973 Oil Embargo: How a Cartel's Repeated Game Reshaped an Economy

OPEC's Arab members cut off oil to the United States for six months in 1973. The embargo itself ended quickly. The strategic behavior it triggered, on both sides, did not.

Facts drawn from the US State Department's Office of the Historian, the US Energy Information Administration, and Encyclopaedia Britannica; interpretive framing is labeled as modeled analysis.

In October 1973, Arab members of OPEC declared an oil embargo against the United States and other countries seen as supporting Israel during the Yom Kippur War, cutting off a major source of the country's imported crude oil.

[VERIFIED] Crude oil prices rose from about 3 dollars a barrel before the embargo to roughly 12 dollars a barrel by early 1974, according to the US Energy Information Administration's historical price data, a nearly fourfold increase in a matter of months.

Sources

[VERIFIED] The 1973 to 1974 embargo's cause, timeline, and end date US Department of State, Office of the Historian, Milestones 1969 to 1976, Oil Embargo
[VERIFIED] Historical crude oil price data before and after the embargo US Energy Information Administration, historical crude oil prices
[VERIFIED] The broader context and consequences of the 1973 to 1974 oil crisis US Department of State, Office of the Historian, Oil Embargo, 1973 to 1974