BusinessAugust 31, 2026
derates
dee-RAYTS
Definition
The act of electronically limiting an engine's performance, such as reducing its speed or power output, as a consequence for failing to use required emissions-control fluids like diesel exhaust fluid.
Etymology
Derived from the prefix 'de-', meaning to remove or reverse, and 'rate', from the Old French 'rate' (fixed price or assessment), ultimately evolving in technical contexts to mean the reduction of a system's rated capacity.
In the news
The article suggests that the EPA should retain derates as an enforcement mechanism to ensure drivers continue using DEF, as these performance restrictions serve as a penalty for non-compliance.
Fuel Retailers Call on EPA to Safeguard Emissions Reductions Achievements
Read the full article ↗Oklahoma Farm Report