Section 3. Petroleum

Monthly Energy Review, May, 2005

Beginning in January 1993, the end-of-month stocks of distillate fuel oil are split into two sulfur categories (0.05 percent sulfur or less and greater than 0.05 percent sulfur) to meet Environmental Protection Agency requirements effective in October 1992. For further details, see the EIA, Petroleum Supply Monthly.

Note 4. New Stock Basis: In January 1975, 1979, 1981, and 1983, numerous respondents were added to bulk terminal and pipeline surveys, affecting subsequent stocks reported and stock change calculations. Using the expanded coverage (new basis), the end-of-year stocks, in million barrels, would have been:

Crude Oil: 1982--645 (Total) and 351 (Other Primary).

Crude Oil and Petroleum Products: 1974--1,121; 1980--1,425; and 1982--1,461.

Motor Gasoline: 1974--225; 1980--263 (Total) and 214 (Finished); 1982--244 (Total) and 202 (Finished).

Distillate Fuel Oil: 1974--224; 1980--205; and 1982--186.

Residual Fuel Oil: 1974--75; 1980--91; and 1982--69.

Jet Fuel: 1974--30 (Total) and 24 (Kerosene Type); 1980--42 (Total) and 36 (Kerosene Type); and 1982--39 (Total) and 32 (Kerosene Type).

Liquefied Petroleum Gases: 1974--113; 1978--136; 1980--128; and 1982--102.

Propane and Propylene: 1978--86; 1980--69; and 1982--57.

Other Petroleum Products: 1974--190; 1980--207; and 1982--219.

Stock change calculations beginning in 1975, 1979, 1981, and 1983 were made by using new basis stock levels.

In January 1984, changes were made in the reporting of natural gas liquids. As a result, unfractionated stream, which was formerly included in the "Other Petroleum Products Supply and Disposition" table, is now reported on a component basis (ethane, propane, normal butane, isobutane, and pentanes plus). Most of these stocks now appear in the "Liquefied Petroleum Gases Supply and Disposition" table. This change affects stocks reported and stock change calculations in each table. Under the new basis, end-of-year 1983 stocks, in million barrels, would have been: 108 for liquefied petroleum gases, 55 for propane and propylene, and 210 for other petroleum products.

In January 1993, changes were made in the monthly surveys to begin collecting bulk terminal and pipeline stocks of oxygenates. This change affected stocks reported and stock change calculations. However, a new basis stock level was not calculated for 1992 end-of-year stocks.

Note 5. Stocks of Alaskan Crude Oil: Stocks of Alaskan Crude oil in transit were included for the first time in January 1981. The major impact of this change is on the reporting of stock change calculations. Using the expanded coverage (new basis), 1980 end-of-year stocks, in million barrels, would have been 488 (Total) and 380 (Other Primary).

Note 6. Data Discrepancies: Due to differences internal to EIA data processing systems, some small discrepancies exist between data in the Monthly Energy Review (MER) and the Petroleum Supply Annual (PSA) and Petroleum Supply Monthly (PSM). The data that have discrepancies are footnoted in Section 3 tables and summarized here.