What Gas Costs
and Why
An independent guide to the price at the pumpData release · 30 September 2026
Home / Boston (US) | Fuel price evidence

The evidence behind the price

Boston: what changed?

Dated inputs, measured movements and the limits of each comparison.

Why prices changed

Gasoline / petrol

-0.012 USD/L (-1.049%)

The gasoline price moved from 1.159 on 2026-09-21 to 1.147 on 2026-09-28. The chart reconciles the measured change using the site’s accounting model.

Contribution values
Estimated accounting contributions, USD/L
ComponentChange
Crude benchmark movement-0.004
Exchange-rate movement+0.000
Refining & distribution residual-0.009
Taxes+0.000
Rounding / unallocated remainder+0.000

Left: decrease. Right: increase. Oil is valued at the earlier FX rate; currency movement uses the later oil price. The downstream residual includes unmeasured costs and timing, not just margins. Taxes can change with prices without a policy change. This is accounting, not proof of causation.

Diesel

No comparable weekly observations are available.

Reporting around these observation dates

Source headlines provide context. Their presence does not establish what caused the price movement.

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.

Pump price and local-currency crude, indexed to 1002025-08-11 to 2026-09-28. Navy is pump price; teal is crude. A data table follows.047951421892025-08-112026-09-28Pump price (navy) · Crude in local currency (teal) · First paired date = 100
Relative movements, not a breakdown of pump costs. Crude is a proxy, not wholesale fuel.
Chart data and publishers (60 observations)
DatePump, USD/LCrude proxy, local / LPublisher
2025-08-110.8150.409US Energy Information Administration
2025-08-180.8130.406US Energy Information Administration
2025-08-250.8170.410US Energy Information Administration
2025-09-010.8160.405US Energy Information Administration
2025-09-080.8250.394US Energy Information Administration
2025-09-150.8190.400US Energy Information Administration
2025-09-220.8120.396US Energy Information Administration
2025-09-290.8000.404US Energy Information Administration
2025-10-060.7920.393US Energy Information Administration
2025-10-130.7870.376US Energy Information Administration
2025-10-200.7760.367US Energy Information Administration
2025-10-270.7720.391US Energy Information Administration
2025-11-030.7740.389US Energy Information Administration
2025-11-100.7840.383US Energy Information Administration
2025-11-170.7830.382US Energy Information Administration
2025-11-240.7900.372US Energy Information Administration
2025-12-010.7850.374US Energy Information Administration
2025-12-080.7750.371US Energy Information Administration
2025-12-150.7700.358US Energy Information Administration
2025-12-220.7610.366US Energy Information Administration
2025-12-290.7590.364US Energy Information Administration
2026-01-050.7560.365US Energy Information Administration
2026-01-120.7480.374US Energy Information Administration
2026-01-190.7430.374US Energy Information Administration
2026-01-260.7410.380US Energy Information Administration
2026-02-020.7520.387US Energy Information Administration
2026-02-090.7620.406US Energy Information Administration
2026-02-160.7590.397US Energy Information Administration
2026-02-230.7630.417US Energy Information Administration
2026-03-020.7770.447US Energy Information Administration
2026-03-090.8890.595US Energy Information Administration
2026-03-160.9280.587US Energy Information Administration
2026-03-230.9780.562US Energy Information Administration
2026-03-300.9990.658US Energy Information Administration
2026-04-061.0360.717US Energy Information Administration
2026-04-131.0400.634US Energy Information Administration
2026-04-201.0340.573US Energy Information Administration
2026-04-271.0640.628US Energy Information Administration
2026-05-041.1580.690US Energy Information Administration
2026-05-111.1800.639US Energy Information Administration
2026-05-181.1780.706US Energy Information Administration
2026-05-251.1730.631US Energy Information Administration
2026-06-011.1600.604US Energy Information Administration
2026-06-081.1260.598US Energy Information Administration
2026-06-151.0910.532US Energy Information Administration
2026-06-221.0550.497US Energy Information Administration
2026-06-291.0260.452US Energy Information Administration
2026-07-061.0110.438US Energy Information Administration
2026-07-131.0150.498US Energy Information Administration
2026-07-201.0550.531US Energy Information Administration
2026-07-271.0830.530US Energy Information Administration
2026-08-031.0770.516US Energy Information Administration
2026-08-101.0500.527US Energy Information Administration
2026-08-171.0490.541US Energy Information Administration
2026-08-241.0680.543US Energy Information Administration
2026-08-311.0790.547US Energy Information Administration
2026-09-071.1040.583US Energy Information Administration
2026-09-141.1270.644US Energy Information Administration
2026-09-211.1590.610US Energy Information Administration
2026-09-281.1470.606US Energy Information Administration
Correlation of weekly changes, from -1 (opposite) to +1 (together)
DelayAll changesOil increasesOil decreases
0 weeks0.57 (59 pairs)0.74 (28)0.11 (31)
1 weeks0.51 (58 pairs)0.42 (28)0.17 (30)
2 weeks0.16 (57 pairs)0.15 (28)-0.19 (29)
3 weeks-0.10 (56 pairs)-0.05 (27)-0.15 (29)
4 weeks0.23 (55 pairs)0.11 (26)-0.00 (29)
5 weeks0.17 (54 pairs)0.03 (25)0.09 (29)
6 weeks-0.02 (53 pairs)-0.28 (24)0.18 (29)
7 weeks0.05 (52 pairs)-0.21 (23)0.32 (29)
8 weeks0.29 (51 pairs)0.09 (22)0.27 (29)

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.

No compatible history is available for this chart.

No historical observations available.

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
USD per litre, with policy event dates2021-10-04 to 2026-09-28. Dashed lines mark verified policy events; they do not establish causation. A data table follows.0.000.360.721.081.442021-10-042026-09-28US Energy Information Administration · USD/L
No curated policy events fall within the displayed price history.
Chart data and publishers (261 observations)
DatePump, USD/LPublisher
2021-10-040.813US Energy Information Administration
2021-10-110.835US Energy Information Administration
2021-10-180.863US Energy Information Administration
2021-10-250.881US Energy Information Administration
2021-11-010.889US Energy Information Administration
2021-11-080.899US Energy Information Administration
2021-11-150.899US Energy Information Administration
2021-11-220.898US Energy Information Administration
2021-11-290.897US Energy Information Administration
2021-12-060.891US Energy Information Administration
2021-12-130.885US Energy Information Administration
2021-12-200.885US Energy Information Administration
2021-12-270.887US Energy Information Administration
2022-01-030.884US Energy Information Administration
2022-01-100.879US Energy Information Administration
2022-01-170.879US Energy Information Administration
2022-01-240.876US Energy Information Administration
2022-01-310.882US Energy Information Administration
2022-02-070.899US Energy Information Administration
2022-02-140.915US Energy Information Administration
2022-02-210.932US Energy Information Administration
2022-02-280.947US Energy Information Administration
2022-03-071.102US Energy Information Administration
2022-03-141.138US Energy Information Administration
2022-03-211.121US Energy Information Administration
2022-03-281.113US Energy Information Administration
2022-04-041.092US Energy Information Administration
2022-04-111.082US Energy Information Administration
2022-04-181.076US Energy Information Administration
2022-04-251.089US Energy Information Administration
2022-05-021.113US Energy Information Administration
2022-05-091.166US Energy Information Administration
2022-05-161.231US Energy Information Administration
2022-05-231.255US Energy Information Administration
2022-05-301.260US Energy Information Administration
2022-06-061.322US Energy Information Administration
2022-06-131.337US Energy Information Administration
2022-06-201.315US Energy Information Administration
2022-06-271.293US Energy Information Administration
2022-07-041.277US Energy Information Administration
2022-07-111.242US Energy Information Administration
2022-07-181.219US Energy Information Administration
2022-07-251.192US Energy Information Administration
2022-08-011.183US Energy Information Administration
2022-08-081.155US Energy Information Administration
2022-08-151.124US Energy Information Administration
2022-08-221.106US Energy Information Administration
2022-08-291.072US Energy Information Administration
2022-09-051.031US Energy Information Administration
2022-09-120.997US Energy Information Administration
2022-09-190.971US Energy Information Administration
2022-09-260.941US Energy Information Administration
2022-10-030.916US Energy Information Administration
2022-10-100.938US Energy Information Administration
2022-10-170.949US Energy Information Administration
2022-10-240.944US Energy Information Administration
2022-10-310.987US Energy Information Administration
2022-11-071.010US Energy Information Administration
2022-11-141.010US Energy Information Administration
2022-11-211.001US Energy Information Administration
2022-11-280.990US Energy Information Administration
2022-12-050.965US Energy Information Administration
2022-12-120.927US Energy Information Administration
2022-12-190.893US Energy Information Administration
2022-12-260.880US Energy Information Administration
2023-01-020.879US Energy Information Administration
2023-01-090.872US Energy Information Administration
2023-01-160.864US Energy Information Administration
2023-01-230.889US Energy Information Administration
2023-01-300.898US Energy Information Administration
2023-02-060.891US Energy Information Administration
2023-02-130.887US Energy Information Administration
2023-02-200.878US Energy Information Administration
2023-02-270.860US Energy Information Administration
2023-03-060.861US Energy Information Administration
2023-03-130.865US Energy Information Administration
2023-03-200.855US Energy Information Administration
2023-03-270.851US Energy Information Administration
2023-04-030.856US Energy Information Administration
2023-04-100.884US Energy Information Administration
2023-04-170.890US Energy Information Administration
2023-04-240.921US Energy Information Administration
2023-05-010.914US Energy Information Administration
2023-05-080.901US Energy Information Administration
2023-05-150.897US Energy Information Administration
2023-05-220.902US Energy Information Administration
2023-05-290.924US Energy Information Administration
2023-06-050.926US Energy Information Administration
2023-06-120.928US Energy Information Administration
2023-06-190.929US Energy Information Administration
2023-06-260.929US Energy Information Administration
2023-07-030.932US Energy Information Administration
2023-07-100.932US Energy Information Administration
2023-07-170.932US Energy Information Administration
2023-07-240.936US Energy Information Administration
2023-07-310.968US Energy Information Administration
2023-08-070.990US Energy Information Administration
2023-08-140.991US Energy Information Administration
2023-08-210.995US Energy Information Administration
2023-08-280.993US Energy Information Administration
2023-09-040.983US Energy Information Administration
2023-09-110.981US Energy Information Administration
2023-09-180.989US Energy Information Administration
2023-09-250.987US Energy Information Administration
2023-10-020.978US Energy Information Administration
2023-10-090.966US Energy Information Administration
2023-10-160.955US Energy Information Administration
2023-10-230.940US Energy Information Administration
2023-10-300.935US Energy Information Administration
2023-11-060.925US Energy Information Administration
2023-11-130.912US Energy Information Administration
2023-11-200.902US Energy Information Administration
2023-11-270.894US Energy Information Administration
2023-12-040.879US Energy Information Administration
2023-12-110.859US Energy Information Administration
2023-12-180.848US Energy Information Administration
2023-12-250.848US Energy Information Administration
2024-01-010.844US Energy Information Administration
2024-01-080.841US Energy Information Administration
2024-01-150.825US Energy Information Administration
2024-01-220.821US Energy Information Administration
2024-01-290.823US Energy Information Administration
2024-02-050.830US Energy Information Administration
2024-02-120.826US Energy Information Administration
2024-02-190.828US Energy Information Administration
2024-02-260.831US Energy Information Administration
2024-03-040.836US Energy Information Administration
2024-03-110.835US Energy Information Administration
2024-03-180.849US Energy Information Administration
2024-03-250.866US Energy Information Administration
2024-04-010.867US Energy Information Administration
2024-04-080.874US Energy Information Administration
2024-04-150.895US Energy Information Administration
2024-04-220.945US Energy Information Administration
2024-04-290.955US Energy Information Administration
2024-05-060.950US Energy Information Administration
2024-05-130.946US Energy Information Administration
2024-05-200.937US Energy Information Administration
2024-05-270.936US Energy Information Administration
2024-06-030.930US Energy Information Administration
2024-06-100.924US Energy Information Administration
2024-06-170.919US Energy Information Administration
2024-06-240.906US Energy Information Administration
2024-07-010.916US Energy Information Administration
2024-07-080.922US Energy Information Administration
2024-07-150.924US Energy Information Administration
2024-07-220.921US Energy Information Administration
2024-07-290.917US Energy Information Administration
2024-08-050.915US Energy Information Administration
2024-08-120.903US Energy Information Administration
2024-08-190.897US Energy Information Administration
2024-08-260.889US Energy Information Administration
2024-09-020.873US Energy Information Administration
2024-09-090.858US Energy Information Administration
2024-09-160.832US Energy Information Administration
2024-09-230.819US Energy Information Administration
2024-09-300.801US Energy Information Administration
2024-10-070.803US Energy Information Administration
2024-10-140.811US Energy Information Administration
2024-10-210.805US Energy Information Administration
2024-10-280.805US Energy Information Administration
2024-11-040.790US Energy Information Administration
2024-11-110.788US Energy Information Administration
2024-11-180.786US Energy Information Administration
2024-11-250.789US Energy Information Administration
2024-12-020.796US Energy Information Administration
2024-12-090.788US Energy Information Administration
2024-12-160.789US Energy Information Administration
2024-12-230.785US Energy Information Administration
2024-12-300.784US Energy Information Administration
2025-01-060.787US Energy Information Administration
2025-01-130.785US Energy Information Administration
2025-01-200.803US Energy Information Administration
2025-01-270.801US Energy Information Administration
2025-02-030.790US Energy Information Administration
2025-02-100.791US Energy Information Administration
2025-02-170.794US Energy Information Administration
2025-02-240.795US Energy Information Administration
2025-03-030.785US Energy Information Administration
2025-03-100.781US Energy Information Administration
2025-03-170.768US Energy Information Administration
2025-03-240.770US Energy Information Administration
2025-03-310.772US Energy Information Administration
2025-04-070.772US Energy Information Administration
2025-04-140.757US Energy Information Administration
2025-04-210.767US Energy Information Administration
2025-04-280.771US Energy Information Administration
2025-05-050.773US Energy Information Administration
2025-05-120.772US Energy Information Administration
2025-05-190.784US Energy Information Administration
2025-05-260.781US Energy Information Administration
2025-06-020.780US Energy Information Administration
2025-06-090.776US Energy Information Administration
2025-06-160.780US Energy Information Administration
2025-06-230.813US Energy Information Administration
2025-06-300.802US Energy Information Administration
2025-07-070.795US Energy Information Administration
2025-07-140.794US Energy Information Administration
2025-07-210.798US Energy Information Administration
2025-07-280.794US Energy Information Administration
2025-08-040.818US Energy Information Administration
2025-08-110.815US Energy Information Administration
2025-08-180.813US Energy Information Administration
2025-08-250.817US Energy Information Administration
2025-09-010.816US Energy Information Administration
2025-09-080.825US Energy Information Administration
2025-09-150.819US Energy Information Administration
2025-09-220.812US Energy Information Administration
2025-09-290.800US Energy Information Administration
2025-10-060.792US Energy Information Administration
2025-10-130.787US Energy Information Administration
2025-10-200.776US Energy Information Administration
2025-10-270.772US Energy Information Administration
2025-11-030.774US Energy Information Administration
2025-11-100.784US Energy Information Administration
2025-11-170.783US Energy Information Administration
2025-11-240.790US Energy Information Administration
2025-12-010.785US Energy Information Administration
2025-12-080.775US Energy Information Administration
2025-12-150.770US Energy Information Administration
2025-12-220.761US Energy Information Administration
2025-12-290.759US Energy Information Administration
2026-01-050.756US Energy Information Administration
2026-01-120.748US Energy Information Administration
2026-01-190.743US Energy Information Administration
2026-01-260.741US Energy Information Administration
2026-02-020.752US Energy Information Administration
2026-02-090.762US Energy Information Administration
2026-02-160.759US Energy Information Administration
2026-02-230.763US Energy Information Administration
2026-03-020.777US Energy Information Administration
2026-03-090.889US Energy Information Administration
2026-03-160.928US Energy Information Administration
2026-03-230.978US Energy Information Administration
2026-03-300.999US Energy Information Administration
2026-04-061.036US Energy Information Administration
2026-04-131.040US Energy Information Administration
2026-04-201.034US Energy Information Administration
2026-04-271.064US Energy Information Administration
2026-05-041.158US Energy Information Administration
2026-05-111.180US Energy Information Administration
2026-05-181.178US Energy Information Administration
2026-05-251.173US Energy Information Administration
2026-06-011.160US Energy Information Administration
2026-06-081.126US Energy Information Administration
2026-06-151.091US Energy Information Administration
2026-06-221.055US Energy Information Administration
2026-06-291.026US Energy Information Administration
2026-07-061.011US Energy Information Administration
2026-07-131.015US Energy Information Administration
2026-07-201.055US Energy Information Administration
2026-07-271.083US Energy Information Administration
2026-08-031.077US Energy Information Administration
2026-08-101.050US Energy Information Administration
2026-08-171.049US Energy Information Administration
2026-08-241.068US Energy Information Administration
2026-08-311.079US Energy Information Administration
2026-09-071.104US Energy Information Administration
2026-09-141.127US Energy Information Administration
2026-09-211.159US Energy Information Administration
2026-09-281.147US Energy Information Administration

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

No compatible history is available for this chart.

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: US Energy Information Administration. Observation: 2026-09-28. Last successful publisher refresh: 2026-09-30 07:39:45 UTC. Observation ingestion: 2026-09-30 07:39:44 UTC.

Original value: 4.341 USD USD/gal. Display: 1.146771 USD/L. Method: derived.

Crude input
WTI 96.41 USD/barrel, 2026-09-22
Display currency FX
USD_USD 1, 2026-09-28
Source currency FX
USD_USD 1, 2026-09-28
Reuse terms
US government public 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 (2 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)ObservationPrice / LVersion
2026-09-30T07:44:55.451193Z2026-09-281.146771 USDb76cb1fc5ae4
2026-09-23T06:02:25Z2026-09-071.103711 USDc05afb5a65c5
Diesel

A calculation receipt will be recorded on the next data export.

Boston price overview · Embed this region’s chart