US retail diesel prices hit a four-year high, topping a peak seen during the early stages of the Iran war to approach a record. The national average pump price climbed to $5. 783 a gallon on Wednesday, according to the American Automobile Association.
Source: [Bloomberg Markets](https://www.bloomberg.com/news/videos/2026-09-03/us-diesel-prices-at-highest-since-mid-2022-video)