Gasoline / petrol
A matching publisher and a 6–10 day comparison are required.
The evidence behind the price
Massachusetts: what changed?
Dated inputs, measured movements and the limits of each comparison.
Why prices changed
Diesel
A matching publisher and a 6–10 day comparison are required.
Reporting around these observation dates
Source headlines provide context. Their presence does not establish what caused the price movement.
No matching source reports are available for this observation interval.
Oil fell. Did the pump follow?
Gasoline / petrol
Does local crude movement line up more closely with pump changes in the same week or later? This compares weekly changes at delays of 0 to 8 weeks over up to five years, using the latest continuous publisher and currency segment.
Chart data and publishers (1 observations)
| Date | Pump, USD/L | Crude proxy, local / L | Publisher |
|---|---|---|---|
| 2026-09-30 | 1.155 | 0.606 | AAA state gas price averages |
0 compatible weekly changes; at least 52 are required for lag analysis.
At least 52 compatible weekly changes are needed; each correlation needs 12 pairs and variation in both series. Joins allow one day of reporting-date variation. Missing weeks are not filled. Each later pump change covers one week, not a cumulative response. Correlation does not measure a causal pass-through delay or prove that rises travel faster than falls. No forecast is implied. Benchmark and FX inputs are no more than 10 days old and never from a future date.
Diesel
Does local crude movement line up more closely with pump changes in the same week or later? This compares weekly changes at delays of 0 to 8 weeks over up to five years, using the latest continuous publisher and currency segment.
Chart data and publishers (3 observations)
| Date | Pump, USD/L | Crude proxy, local / L | Publisher |
|---|---|---|---|
| 2026-09-10 | 1.556 | 0.651 | AAA state gas price averages |
| 2026-09-14 | 1.610 | 0.644 | AAA state gas price averages |
| 2026-09-30 | 1.681 | 0.606 | AAA state gas price averages |
0 compatible weekly changes; at least 52 are required for lag analysis.
At least 52 compatible weekly changes are needed; each correlation needs 12 pairs and variation in both series. Joins allow one day of reporting-date variation. Missing weeks are not filled. Each later pump change covers one week, not a cumulative response. Correlation does not measure a causal pass-through delay or prove that rises travel faster than falls. No forecast is implied. Benchmark and FX inputs are no more than 10 days old and never from a future date.
Policy dates alongside prices
Gasoline / petrol
Chart data and publishers (260 observations)
| Date | Pump, USD/L | Publisher |
|---|---|---|
| 2021-10-11 | 0.840 | US Energy Information Administration |
| 2021-10-18 | 0.865 | US Energy Information Administration |
| 2021-10-25 | 0.886 | US Energy Information Administration |
| 2021-11-01 | 0.893 | US Energy Information Administration |
| 2021-11-08 | 0.899 | US Energy Information Administration |
| 2021-11-15 | 0.898 | US Energy Information Administration |
| 2021-11-22 | 0.897 | US Energy Information Administration |
| 2021-11-29 | 0.896 | US Energy Information Administration |
| 2021-12-06 | 0.891 | US Energy Information Administration |
| 2021-12-13 | 0.886 | US Energy Information Administration |
| 2021-12-20 | 0.885 | US Energy Information Administration |
| 2021-12-27 | 0.886 | US Energy Information Administration |
| 2022-01-03 | 0.884 | US Energy Information Administration |
| 2022-01-10 | 0.880 | US Energy Information Administration |
| 2022-01-17 | 0.872 | US Energy Information Administration |
| 2022-01-24 | 0.869 | US Energy Information Administration |
| 2022-01-31 | 0.878 | US Energy Information Administration |
| 2022-02-07 | 0.896 | US Energy Information Administration |
| 2022-02-14 | 0.910 | US Energy Information Administration |
| 2022-02-21 | 0.928 | US Energy Information Administration |
| 2022-02-28 | 0.946 | US Energy Information Administration |
| 2022-03-07 | 1.103 | US Energy Information Administration |
| 2022-03-14 | 1.135 | US Energy Information Administration |
| 2022-03-21 | 1.110 | US Energy Information Administration |
| 2022-03-28 | 1.103 | US Energy Information Administration |
| 2022-04-04 | 1.084 | US Energy Information Administration |
| 2022-04-11 | 1.067 | US Energy Information Administration |
| 2022-04-18 | 1.064 | US Energy Information Administration |
| 2022-04-25 | 1.082 | US Energy Information Administration |
| 2022-05-02 | 1.107 | US Energy Information Administration |
| 2022-05-09 | 1.162 | US Energy Information Administration |
| 2022-05-16 | 1.228 | US Energy Information Administration |
| 2022-05-23 | 1.245 | US Energy Information Administration |
| 2022-05-30 | 1.248 | US Energy Information Administration |
| 2022-06-06 | 1.315 | US Energy Information Administration |
| 2022-06-13 | 1.331 | US Energy Information Administration |
| 2022-06-20 | 1.309 | US Energy Information Administration |
| 2022-06-27 | 1.285 | US Energy Information Administration |
| 2022-07-04 | 1.264 | US Energy Information Administration |
| 2022-07-11 | 1.226 | US Energy Information Administration |
| 2022-07-18 | 1.199 | US Energy Information Administration |
| 2022-07-25 | 1.173 | US Energy Information Administration |
| 2022-08-01 | 1.162 | US Energy Information Administration |
| 2022-08-08 | 1.143 | US Energy Information Administration |
| 2022-08-15 | 1.110 | US Energy Information Administration |
| 2022-08-22 | 1.087 | US Energy Information Administration |
| 2022-08-29 | 1.059 | US Energy Information Administration |
| 2022-09-05 | 1.019 | US Energy Information Administration |
| 2022-09-12 | 0.986 | US Energy Information Administration |
| 2022-09-19 | 0.958 | US Energy Information Administration |
| 2022-09-26 | 0.928 | US Energy Information Administration |
| 2022-10-03 | 0.907 | US Energy Information Administration |
| 2022-10-10 | 0.935 | US Energy Information Administration |
| 2022-10-17 | 0.945 | US Energy Information Administration |
| 2022-10-24 | 0.934 | US Energy Information Administration |
| 2022-10-31 | 0.986 | US Energy Information Administration |
| 2022-11-07 | 1.009 | US Energy Information Administration |
| 2022-11-14 | 1.007 | US Energy Information Administration |
| 2022-11-21 | 0.998 | US Energy Information Administration |
| 2022-11-28 | 0.975 | US Energy Information Administration |
| 2022-12-05 | 0.950 | US Energy Information Administration |
| 2022-12-12 | 0.916 | US Energy Information Administration |
| 2022-12-19 | 0.885 | US Energy Information Administration |
| 2022-12-26 | 0.872 | US Energy Information Administration |
| 2023-01-02 | 0.872 | US Energy Information Administration |
| 2023-01-09 | 0.863 | US Energy Information Administration |
| 2023-01-16 | 0.860 | US Energy Information Administration |
| 2023-01-23 | 0.884 | US Energy Information Administration |
| 2023-01-30 | 0.893 | US Energy Information Administration |
| 2023-02-06 | 0.889 | US Energy Information Administration |
| 2023-02-13 | 0.883 | US Energy Information Administration |
| 2023-02-20 | 0.872 | US Energy Information Administration |
| 2023-02-27 | 0.850 | US Energy Information Administration |
| 2023-03-06 | 0.854 | US Energy Information Administration |
| 2023-03-13 | 0.858 | US Energy Information Administration |
| 2023-03-20 | 0.849 | US Energy Information Administration |
| 2023-03-27 | 0.844 | US Energy Information Administration |
| 2023-04-03 | 0.851 | US Energy Information Administration |
| 2023-04-10 | 0.879 | US Energy Information Administration |
| 2023-04-17 | 0.886 | US Energy Information Administration |
| 2023-04-24 | 0.918 | US Energy Information Administration |
| 2023-05-01 | 0.916 | US Energy Information Administration |
| 2023-05-08 | 0.900 | US Energy Information Administration |
| 2023-05-15 | 0.893 | US Energy Information Administration |
| 2023-05-22 | 0.897 | US Energy Information Administration |
| 2023-05-29 | 0.922 | US Energy Information Administration |
| 2023-06-05 | 0.923 | US Energy Information Administration |
| 2023-06-12 | 0.924 | US Energy Information Administration |
| 2023-06-19 | 0.926 | US Energy Information Administration |
| 2023-06-26 | 0.926 | US Energy Information Administration |
| 2023-07-03 | 0.931 | US Energy Information Administration |
| 2023-07-10 | 0.926 | US Energy Information Administration |
| 2023-07-17 | 0.926 | US Energy Information Administration |
| 2023-07-24 | 0.931 | US Energy Information Administration |
| 2023-07-31 | 0.962 | US Energy Information Administration |
| 2023-08-07 | 0.992 | US Energy Information Administration |
| 2023-08-14 | 0.987 | US Energy Information Administration |
| 2023-08-21 | 0.990 | US Energy Information Administration |
| 2023-08-28 | 0.983 | US Energy Information Administration |
| 2023-09-04 | 0.977 | US Energy Information Administration |
| 2023-09-11 | 0.977 | US Energy Information Administration |
| 2023-09-18 | 0.988 | US Energy Information Administration |
| 2023-09-25 | 0.985 | US Energy Information Administration |
| 2023-10-02 | 0.973 | US Energy Information Administration |
| 2023-10-09 | 0.963 | US Energy Information Administration |
| 2023-10-16 | 0.948 | US Energy Information Administration |
| 2023-10-23 | 0.934 | US Energy Information Administration |
| 2023-10-30 | 0.928 | US Energy Information Administration |
| 2023-11-06 | 0.918 | US Energy Information Administration |
| 2023-11-13 | 0.906 | US Energy Information Administration |
| 2023-11-20 | 0.895 | US Energy Information Administration |
| 2023-11-27 | 0.886 | US Energy Information Administration |
| 2023-12-04 | 0.873 | US Energy Information Administration |
| 2023-12-11 | 0.856 | US Energy Information Administration |
| 2023-12-18 | 0.842 | US Energy Information Administration |
| 2023-12-25 | 0.837 | US Energy Information Administration |
| 2024-01-01 | 0.832 | US Energy Information Administration |
| 2024-01-08 | 0.829 | US Energy Information Administration |
| 2024-01-15 | 0.813 | US Energy Information Administration |
| 2024-01-22 | 0.810 | US Energy Information Administration |
| 2024-01-29 | 0.810 | US Energy Information Administration |
| 2024-02-05 | 0.821 | US Energy Information Administration |
| 2024-02-12 | 0.822 | US Energy Information Administration |
| 2024-02-19 | 0.829 | US Energy Information Administration |
| 2024-02-26 | 0.830 | US Energy Information Administration |
| 2024-03-04 | 0.834 | US Energy Information Administration |
| 2024-03-11 | 0.837 | US Energy Information Administration |
| 2024-03-18 | 0.850 | US Energy Information Administration |
| 2024-03-25 | 0.869 | US Energy Information Administration |
| 2024-04-01 | 0.867 | US Energy Information Administration |
| 2024-04-08 | 0.873 | US Energy Information Administration |
| 2024-04-15 | 0.894 | US Energy Information Administration |
| 2024-04-22 | 0.942 | US Energy Information Administration |
| 2024-04-29 | 0.951 | US Energy Information Administration |
| 2024-05-06 | 0.948 | US Energy Information Administration |
| 2024-05-13 | 0.940 | US Energy Information Administration |
| 2024-05-20 | 0.929 | US Energy Information Administration |
| 2024-05-27 | 0.929 | US Energy Information Administration |
| 2024-06-03 | 0.925 | US Energy Information Administration |
| 2024-06-10 | 0.911 | US Energy Information Administration |
| 2024-06-17 | 0.908 | US Energy Information Administration |
| 2024-06-24 | 0.899 | US Energy Information Administration |
| 2024-07-01 | 0.913 | US Energy Information Administration |
| 2024-07-08 | 0.923 | US Energy Information Administration |
| 2024-07-15 | 0.922 | US Energy Information Administration |
| 2024-07-22 | 0.918 | US Energy Information Administration |
| 2024-07-29 | 0.911 | US Energy Information Administration |
| 2024-08-05 | 0.906 | US Energy Information Administration |
| 2024-08-12 | 0.895 | US Energy Information Administration |
| 2024-08-19 | 0.892 | US Energy Information Administration |
| 2024-08-26 | 0.876 | US Energy Information Administration |
| 2024-09-02 | 0.864 | US Energy Information Administration |
| 2024-09-09 | 0.850 | US Energy Information Administration |
| 2024-09-16 | 0.827 | US Energy Information Administration |
| 2024-09-23 | 0.815 | US Energy Information Administration |
| 2024-09-30 | 0.796 | US Energy Information Administration |
| 2024-10-07 | 0.795 | US Energy Information Administration |
| 2024-10-14 | 0.804 | US Energy Information Administration |
| 2024-10-21 | 0.799 | US Energy Information Administration |
| 2024-10-28 | 0.799 | US Energy Information Administration |
| 2024-11-04 | 0.786 | US Energy Information Administration |
| 2024-11-11 | 0.784 | US Energy Information Administration |
| 2024-11-18 | 0.780 | US Energy Information Administration |
| 2024-11-25 | 0.782 | US Energy Information Administration |
| 2024-12-02 | 0.793 | US Energy Information Administration |
| 2024-12-09 | 0.788 | US Energy Information Administration |
| 2024-12-16 | 0.785 | US Energy Information Administration |
| 2024-12-23 | 0.785 | US Energy Information Administration |
| 2024-12-30 | 0.786 | US Energy Information Administration |
| 2025-01-06 | 0.780 | US Energy Information Administration |
| 2025-01-13 | 0.779 | US Energy Information Administration |
| 2025-01-20 | 0.796 | US Energy Information Administration |
| 2025-01-27 | 0.795 | US Energy Information Administration |
| 2025-02-03 | 0.786 | US Energy Information Administration |
| 2025-02-10 | 0.787 | US Energy Information Administration |
| 2025-02-17 | 0.789 | US Energy Information Administration |
| 2025-02-24 | 0.790 | US Energy Information Administration |
| 2025-03-03 | 0.780 | US Energy Information Administration |
| 2025-03-10 | 0.775 | US Energy Information Administration |
| 2025-03-17 | 0.765 | US Energy Information Administration |
| 2025-03-24 | 0.769 | US Energy Information Administration |
| 2025-03-31 | 0.770 | US Energy Information Administration |
| 2025-04-07 | 0.773 | US Energy Information Administration |
| 2025-04-14 | 0.761 | US Energy Information Administration |
| 2025-04-21 | 0.767 | US Energy Information Administration |
| 2025-04-28 | 0.771 | US Energy Information Administration |
| 2025-05-05 | 0.772 | US Energy Information Administration |
| 2025-05-12 | 0.770 | US Energy Information Administration |
| 2025-05-19 | 0.785 | US Energy Information Administration |
| 2025-05-26 | 0.784 | US Energy Information Administration |
| 2025-06-02 | 0.780 | US Energy Information Administration |
| 2025-06-09 | 0.776 | US Energy Information Administration |
| 2025-06-16 | 0.777 | US Energy Information Administration |
| 2025-06-23 | 0.810 | US Energy Information Administration |
| 2025-06-30 | 0.798 | US Energy Information Administration |
| 2025-07-07 | 0.794 | US Energy Information Administration |
| 2025-07-14 | 0.792 | US Energy Information Administration |
| 2025-07-21 | 0.795 | US Energy Information Administration |
| 2025-07-28 | 0.793 | US Energy Information Administration |
| 2025-08-04 | 0.806 | US Energy Information Administration |
| 2025-08-11 | 0.804 | US Energy Information Administration |
| 2025-08-18 | 0.800 | US Energy Information Administration |
| 2025-08-25 | 0.804 | US Energy Information Administration |
| 2025-09-01 | 0.806 | US Energy Information Administration |
| 2025-09-08 | 0.821 | US Energy Information Administration |
| 2025-09-15 | 0.814 | US Energy Information Administration |
| 2025-09-22 | 0.807 | US Energy Information Administration |
| 2025-09-29 | 0.794 | US Energy Information Administration |
| 2025-10-06 | 0.787 | US Energy Information Administration |
| 2025-10-13 | 0.777 | US Energy Information Administration |
| 2025-10-20 | 0.769 | US Energy Information Administration |
| 2025-10-27 | 0.765 | US Energy Information Administration |
| 2025-11-03 | 0.770 | US Energy Information Administration |
| 2025-11-10 | 0.780 | US Energy Information Administration |
| 2025-11-17 | 0.784 | US Energy Information Administration |
| 2025-11-24 | 0.794 | US Energy Information Administration |
| 2025-12-01 | 0.784 | US Energy Information Administration |
| 2025-12-08 | 0.777 | US Energy Information Administration |
| 2025-12-15 | 0.773 | US Energy Information Administration |
| 2025-12-22 | 0.762 | US Energy Information Administration |
| 2025-12-29 | 0.759 | US Energy Information Administration |
| 2026-01-05 | 0.755 | US Energy Information Administration |
| 2026-01-12 | 0.748 | US Energy Information Administration |
| 2026-01-19 | 0.742 | US Energy Information Administration |
| 2026-01-26 | 0.738 | US Energy Information Administration |
| 2026-02-02 | 0.749 | US Energy Information Administration |
| 2026-02-09 | 0.753 | US Energy Information Administration |
| 2026-02-16 | 0.750 | US Energy Information Administration |
| 2026-02-23 | 0.752 | US Energy Information Administration |
| 2026-03-02 | 0.765 | US Energy Information Administration |
| 2026-03-09 | 0.876 | US Energy Information Administration |
| 2026-03-16 | 0.923 | US Energy Information Administration |
| 2026-03-23 | 0.974 | US Energy Information Administration |
| 2026-03-30 | 0.993 | US Energy Information Administration |
| 2026-04-06 | 1.028 | US Energy Information Administration |
| 2026-04-13 | 1.033 | US Energy Information Administration |
| 2026-04-20 | 1.026 | US Energy Information Administration |
| 2026-04-27 | 1.058 | US Energy Information Administration |
| 2026-05-04 | 1.147 | US Energy Information Administration |
| 2026-05-11 | 1.169 | US Energy Information Administration |
| 2026-05-18 | 1.175 | US Energy Information Administration |
| 2026-05-25 | 1.166 | US Energy Information Administration |
| 2026-06-01 | 1.147 | US Energy Information Administration |
| 2026-06-08 | 1.108 | US Energy Information Administration |
| 2026-06-15 | 1.074 | US Energy Information Administration |
| 2026-06-22 | 1.043 | US Energy Information Administration |
| 2026-06-29 | 1.014 | US Energy Information Administration |
| 2026-07-06 | 1.000 | US Energy Information Administration |
| 2026-07-13 | 1.005 | US Energy Information Administration |
| 2026-07-20 | 1.056 | US Energy Information Administration |
| 2026-07-27 | 1.079 | US Energy Information Administration |
| 2026-08-03 | 1.072 | US Energy Information Administration |
| 2026-08-10 | 1.047 | US Energy Information Administration |
| 2026-08-17 | 1.043 | US Energy Information Administration |
| 2026-08-24 | 1.061 | US Energy Information Administration |
| 2026-08-31 | 1.075 | US Energy Information Administration |
| 2026-09-10 | 1.125 | AAA state gas price averages |
| 2026-09-14 | 1.124 | US Energy Information Administration |
| 2026-09-21 | 1.149 | US Energy Information Administration |
| 2026-09-30 | 1.155 | AAA state gas price averages |
No legal policy events have been curated for this region yet. This is not evidence that policy has been unchanged.
Event coverage is selective. Source tax-rate snapshots are not automatically treated as legal changes. Upcoming recorded tax dates · All regional tax records
Diesel
Chart data and publishers (3 observations)
| Date | Pump, USD/L | Publisher |
|---|---|---|
| 2026-09-10 | 1.556 | AAA state gas price averages |
| 2026-09-14 | 1.610 | AAA state gas price averages |
| 2026-09-30 | 1.681 | AAA state gas price averages |
No legal policy events have been curated for this region yet. This is not evidence that policy has been unchanged.
Event coverage is selective. Source tax-rate snapshots are not automatically treated as legal changes. Upcoming recorded tax dates · All regional tax records
Source receipts
Gasoline / petrol
Publisher: AAA state gas price averages. Observation: 2026-09-30. Last successful publisher refresh: 2026-09-30 07:39:46 UTC. Observation ingestion: 2026-09-30 07:39:46 UTC.
Original value: 4.3734 USD USD/gal. Display: 1.155330 USD/L. Method: derived.
- Crude input
- WTI 96.41 USD/barrel, 2026-09-22
- Display currency FX
- USD_USD 1, 2026-09-30
- Source currency FX
- USD_USD 1, 2026-09-30
- Reuse terms
- AAA Fuel Prices, all rights reserved. Publicly displayed state averages; retain attribution. Not EIA public-domain data.
Derived method: crude = USD/barrel / 158.987 * local currency/USD; yield factor 1.0; downstream = price - taxes - crude. Currency conversion uses display FX / source FX; US gallons convert at 3.785411784 L. Missing inputs are never zero. Benchmark availability alone does not imply a complete component breakdown. Full methodology.
Download receipts and calculation inputs · Historical observations
Publication and revision history (3 saved versions)
Tracking begins with this feature’s first export. A new observation is a publication; a changed value for the same observation date is a revision. This is our publication history, not a complete publisher revision archive. At most 30 versions per fuel are shown; the canonical database retains all recorded versions.
| Recorded (UTC) | Observation | Price / L | Version |
|---|---|---|---|
| 2026-09-30T07:44:55.708995Z | 2026-09-30 | 1.155330 USD | 41279f76030e |
| 2026-09-29T13:02:15Z | 2026-09-14 | 1.146560 USD | f8db0abce908 |
| 2026-09-23T06:02:26Z | 2026-09-14 | 1.146560 USD | 7a44604c0f04 |
Diesel
Publisher: AAA state gas price averages. Observation: 2026-09-30. Last successful publisher refresh: 2026-09-30 07:39:46 UTC. Observation ingestion: 2026-09-30 07:39:46 UTC.
Original value: 6.3631 USD USD/gal. Display: 1.680953 USD/L. Method: derived.
- Crude input
- WTI 96.41 USD/barrel, 2026-09-22
- Display currency FX
- USD_USD 1, 2026-09-30
- Source currency FX
- USD_USD 1, 2026-09-30
- Reuse terms
- AAA Fuel Prices, all rights reserved. Publicly displayed state averages; retain attribution. Not EIA public-domain data.
Derived method: crude = USD/barrel / 158.987 * local currency/USD; yield factor 1.0; downstream = price - taxes - crude. Currency conversion uses display FX / source FX; US gallons convert at 3.785411784 L. Missing inputs are never zero. Benchmark availability alone does not imply a complete component breakdown. Full methodology.
Download receipts and calculation inputs · Historical observations
Publication and revision history (3 saved versions)
Tracking begins with this feature’s first export. A new observation is a publication; a changed value for the same observation date is a revision. This is our publication history, not a complete publisher revision archive. At most 30 versions per fuel are shown; the canonical database retains all recorded versions.
| Recorded (UTC) | Observation | Price / L | Version |
|---|---|---|---|
| 2026-09-30T07:44:55.714705Z | 2026-09-30 | 1.680953 USD | 31bf86229a06 |
| 2026-09-29T13:02:15Z | 2026-09-14 | 1.610314 USD | 789ef124d636 |
| 2026-09-23T06:02:26Z | 2026-09-14 | 1.610314 USD | 0baed766642a |