Topic
environmental regulations
Regulations & Compliance EPA's Proposed Rule on Diesel Engine Derates Raises National Security Concerns
On July 9, 2026, the EPA proposed a rule that would stop new diesel engines from derating speed on emissions faults, instead giving a beep and light. The move follows EPA's admission that the current mandate causes economic hardship. The article covers the rule, related pardons, civil penalties ($45,268 per tampered vehicle), and exemptions for military vehicles.
Regulations & Compliance Proposed EPA Change Keeps NoX Limits, Alters Warranty and Deratement Rules for Trucks
The EPA released a proposed rulemaking that keeps the nitrogen oxide (NoX) emission limits from the 2023 Final Rule but makes key revisions: reducing warranty mileage from 450,000 to 100,000 miles (delayed to model year 2030), eliminating engine deratements in favor of visual/audible warnings, extending useful life provisions to 2030, and establishing noncompliance penalties. The agency says the changes retain 90% of the original NoX reductions and will not increase truck manufacturing costs.
Regulations & Compliance PACCAR Raises DEF Limp-Mode Speed to 25 MPH in Major EPA Enforcement Rollback
On July 6, 2026, PACCAR announced a software update for its MX-11 and MX-13 engines that raises the final DEF-induced limp-mode speed from 5 mph to 25 mph and extends the derate timeline from 4 hours to 160 hours. The change is part of a broader EPA effort since summer 2025 to roll back the harshest aspects of diesel emissions enforcement, responding to complaints from truckers and farmers about false alarms from failure-prone DEF sensors.
Trade EU Pledges No Double Carbon Charges for Shipowners
The European Union has assured shipowners they will not face double carbon charges under both EU and IMO regulations. This commitment was made by Apostolos Tzitzikostas, European commissioner for sustainable transport, at Posidonia 2026.