Diesel Truck Operation in Oregon: Operating a diesel truck in Oregon in 2026 involves navigating a unique mix of state-specific taxes, weight-mile fees, and a shifting fuel market. Oregon’s lack of a general sales tax is balanced by specific fuel taxes and a weight-mile system for heavy vehicles. In 2026, Oregon remains one of the most complex states for diesel budgeting due to the Weight-Mile Tax system and recent legislative shifts. While many expected a significant jump in