In its release of monthly motor fuel prices the Bureau of Transportation Statistics (BTS) reported a price dip in December 2025. The average price for regular motor gasoline was $2.89 per gallon; down 5.1% from November 2025 and down 4.1% from December 2024.
Regional changes were striking. Average gasoline prices in the Rocky Mountain region was $2.58, which was down a full 9.0%. Prices in the Midwest dropped 7.3% to $2.74.
However, prices on the West Coast actually rose 1.7% to $3.87. It was the only region to record an increase.
By region, the average price for regular motor gasoline in December 2025 was and year-over-year change
The average price for diesel no. 2 was $3.62 in December 2025, down 5.4% from November 2025, and up 3.5% from December 2024.
The material on these pages is provided for information sharing purposes only and should not be used in lieu of an OEM service manual or factory authorized service procedure. We are not in the auto repair business, nor do we publish automotive service manuals. Nothing we include on these pages and posts has been reviewed, approved or authorized by any vehicle manufacturer.
Remember — only proper service and repair procedures will ensure the safe and reliable operation of your car. In addition, proper safety procedures and precautions, such as the use of safety goggles, the right tools and the equipment should be followed at all times to eliminate the possibility of personal injury or improper service which could damage the vehicle or compromise its safety.
Technology is always changing and what is current and accurate today may be literally out-of-date and inaccurate tomorrow. And when it comes to the current state of flux in the auto industry, nothing is more true.
The author has 30+ years of automotive experience and has assembled the most extensive collection of symbols and warning lights anywhere (over 1,000!) and can help you open and start any keyless start car with a dead key fob battery. BA, St. Joseph’s, ME: MS, RPI, NY
Motor fuel prices dip in December
In its release of monthly motor fuel prices the Bureau of Transportation Statistics (BTS) reported a price dip in December 2025. The average price for regular motor gasoline was $2.89 per gallon; down 5.1% from November 2025 and down 4.1% from December 2024.
Regional changes were striking. Average gasoline prices in the Rocky Mountain region was $2.58, which was down a full 9.0%. Prices in the Midwest dropped 7.3% to $2.74.
By region, the average price for regular motor gasoline in December 2025 was and year-over-year change
The average price for diesel no. 2 was $3.62 in December 2025, down 5.4% from November 2025, and up 3.5% from December 2024.
There is much more to be found, including interactive charts, on this page.
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The material on these pages is provided for information sharing purposes only and should not be used in lieu of an OEM service manual or factory authorized service procedure. We are not in the auto repair business, nor do we publish automotive service manuals. Nothing we include on these pages and posts has been reviewed, approved or authorized by any vehicle manufacturer.
Remember — only proper service and repair procedures will ensure the safe and reliable operation of your car. In addition, proper safety procedures and precautions, such as the use of safety goggles, the right tools and the equipment should be followed at all times to eliminate the possibility of personal injury or improper service which could damage the vehicle or compromise its safety.
Technology is always changing and what is current and accurate today may be literally out-of-date and inaccurate tomorrow. And when it comes to the current state of flux in the auto industry, nothing is more true.
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The author has 30+ years of automotive experience and has assembled the most extensive collection of symbols and warning lights anywhere (over 1,000!) and can help you open and start any keyless start car with a dead key fob battery. BA, St. Joseph’s, ME: MS, RPI, NY