Source: U.S. Energy Information Administration  

Release: Gasoline and Diesel Fuel Update  

Units:  Dollars per Gallon, Not Seasonally Adjusted

Frequency:  Weekly, Ending Monday

Weighted average based on sampling of approximately 900 retail outlets, 8:00AM Monday. The price represents self-service unless only full-service is available and includes all taxes. See (http://www.eia.doe.gov/oil_gas/petroleum/data_publications/wrgp/mogas_home_page.html) for further definitions. Regular Gasoline has an antiknock index (average of the research octane rating and the motor octane number) greater than or equal to 85 and less than 88. Octane requirements may vary by altitude.

Source: U.S. Bureau of Economic Analysis  

Release: Personal Income and Outlays  

Units:  Index 2017=100, Seasonally Adjusted

Frequency:  Monthly

BEA Account Code: DPCERG

The Personal Consumption Expenditures Price Index is a measure of the prices that people living in the United States, or those buying on their behalf, pay for goods and services. The change in the PCE price index is known for capturing inflation (or deflation) across a wide range of consumer expenses and reflecting changes in consumer behavior. For example, if the price of beef rises, shoppers may buy less beef and more chicken.

The PCE Price Index is produced by the Bureau of Economic Analysis (BEA), which revises previously published PCE data to reflect updated information or new methodology, providing consistency across decades of data that's valuable for researchers. They also offer the series as a Chain-Type index, as above. The PCE price index is used primarily for macroeconomic analysis and forecasting.

The PCE Price index is the Federal Reserve’s preferred measure of inflation. The PCE Price Index is similar to the Bureau of Labor Statistics' consumer price index for urban consumers. The two indexes, which have their own purposes and uses, are constructed differently, resulting in different inflation rates.

For more information on the PCE price index, see:
U.S. Bureau of Economic Analysis, Guide to the National Income and Product Accounts of the United States (NIPA)
U.S. Bureau of Economic Analysis, Personal Consumption Expenditures Price Index
U.S. Bureau of Economic Analysis, Prices & Inflation
U.S. Bureau of Labor Statistics, Differences between the Consumer Price Index and the Personal Consumption Expenditure Price Index