Core Insights - Wholesale diesel prices have surged over 30% in the last week, while retail prices have increased by more than 14%, indicating a significant shift in the fuel market dynamics [2] - The recent oil market disruption is the most significant since the onset of the Russia-Ukraine conflict in early 2022 and follows OPEC's supply constraints in summer 2023 [4] - Fuel costs represent approximately 20-25% of total truckload transportation expenses, making rapid price increases a critical concern for both shippers and carriers [3] Industry Dynamics - Fuel is primarily a pass-through cost for trucking carriers, typically managed through a fuel surcharge linked to the weekly average diesel price published by the Department of Energy [5] - Many large fleets have agreements with fuel suppliers to purchase fuel in bulk at or slightly above wholesale prices, allowing them to remain competitive in a balanced market [6] - The spread between wholesale and retail diesel prices has decreased from approximately $1.02 to $0.68 per gallon, limiting carriers' ability to effectively pass on fuel costs [7]