The 79 oil crisis and rationing was caused by the disruption of oil from the Iran, but the US suffered much more from the disruption of the oil from Iran than other countries that also relied on this oil. It would be wrong to ignore the role the government played in making this oil disruption significantly worse.

From "TheU.S. Petroleum Crisis of 1979", PHILIP K. VERLEGER, JR.

>...On February 28, 1979, DOE published the following notice in the Federal Register: "It is essential that refiners enter the spring driving season with adequate gasoline stocks to meet seasonal demand requirements. We recognize that gasoline stocks are currently at adequate levels for this time of year, which is usually a period of low demand. Recent industry data indicate that total stocks are now in excess of 265 million barrels, which is less than last year's record high levels during the same period but above the average levels of previous years. Our concern is that these stocks not be drawn down precipitously as soon as the impacts of the Iranian shortfall are felt by refiners. Refiners are urged to keep stocks high enough to meet expected demand during the 1979 summer driving season, even if it is necessary to restrict somewhat the amount of surplus gasoline that is made available to purchasers currently"
The implementation of these instructions had the effect of restricting the volume of gasoline available to service stations to between 80 and 90 percent of 1978 levels. This reduction was greater than the reduction in total gasoline supplies.

>...In April 1979, DOE ordered the fifteen largest refiners to sell 7.8 million barrels of crude oil to smaller firms that were unable to obtain supplies on the world market at competitive prices. …These transfers probably reduced the volume of gasoline produced in the second quarter because the refineries that purchased the crude oil had only a limited capacity to produce gasoline, while the refineries that sold it could have produced more. ...In addition to reducing the supply of gasoline, the buy/sell program appears to have affected the geographic distribution of crude oil and gasoline. This is because the primary recipients of the crude oil were refineries in the Midwest and the gulf coast areas, while the sellers were companies that were marketing throughout the nation.

>...…In April, DOE turned its attention to the low stock of distillate fuel oil … Two impacts were observed on domestic markets. First, excessive stocks of heating oil were accumulated. Second, companies may have been influenced to increase gasoline stocks in anticipation of the mandator yield controls that DOE threatened to impose. These controls specified the percent of refiner output that had to be heating oil. Such controls were designed to curtail the output of gasoline. By building higher gasoline inventories, refiners could smooth out the month-to-month distribution of gasoline despite the controls.

>...Price controls on gasoline may have also created an incentive to withhold gasoline from the market when the prices of crude oil were rising rapidly. …In summary, the refiners had the capacity and the knowledge to take advantage of this opportunity. Ironically, the instructions from DOE to the companies were to do precisely what was most profitable.

>...In addition to encouraging the buildup of stocks, DOE may have added to the shortages by creating an incentive to reduce the output of crude oil. Although it is difficult to estimate what domestic supplies of crude oil might have been in the absence of any restriction, a DOE announcement in November that control levels of the base period were to be reviewed may have constrained production in the first half of 1979.