Wild price swings at the gas pump throughout the year make predicting prices for 2023 even more difficult. Diesel prices fell 20% from their peak in June, only about half the decline for gasoline during the same period. Greater demand for North American diesel by Europe in the wake of the war in Ukraine kept diesel prices so high. Most trucking companies charge a fuel surcharge to their customers when diesel prices increase. Many of the western states faced much higher gas prices because of more limited refining capacity.

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