Commercial Vehicle Fuel Consumption Limits

Commercial vehicle fuel consumption limits refer to mandatory national technical standards introduced to regulate commercial vehicle fuel usage and advance energy conservation and emissions reduction. These standards define the maximum permissible fuel consumption thresholds that newly manufactured commercial vehicles must satisfy during Vehicle Type Approval (VTA) and Conformity of Production (COP) audits. As major energy consumers in the transport sector, commercial vehicle fuel efficiency standards represent a cornerstone of the automotive energy management framework and serve as a vital policy instrument for achieving carbon peaking targets.

Regulatory Framework and Scope of Application

China's regulatory framework for commercial vehicle fuel consumption covers all primary vehicle categories, anchored by the following mandatory national standards:

• GB 30510—2024 "Fuel Consumption Limits for Heavy-Duty Commercial Vehicles": Applicable to commercial vehicles with a Gross Vehicle Weight (GVW) exceeding 3,500 kg, encompassing rigid lorries, prime movers, buses, and tipper trucks. Gazetted in 2024 to supersede the GB 30510—2018 edition, it serves as the benchmark standard for heavy commercial vehicle energy efficiency in China.

• GB 20997—2025 "Fuel Consumption Limits for Light-Duty Commercial Vehicles": Applicable to light commercial vehicles (LCVs) including light lorries and light buses/vans with a GVW not exceeding 3,500 kg. Officially gazetted in December 2025, it replaces the GB 20997—2015 edition with significantly tighter consumption thresholds.

• GB 31823—2021 "Fuel Consumption Limits for Container Transport Vehicles": Applicable specifically to dedicated container haulage vehicles.

Consumption Thresholds and Test Cycles

Commercial vehicle fuel consumption testing is conducted in accordance with GB/T 27840 (heavy-duty vehicles) and GB/T 19233 (light-duty vehicles), utilising the C-WTVC (China Heavy-Duty Commercial Vehicle Transient Cycle) test cycle. Developed using real-world traffic data across China, this test cycle reflects local commercial operating profiles far more accurately than standard international test procedures.

Taking heavy commercial vehicles as an example, GB 30510—2024 sets tiered thresholds across categories such as rigid lorries, prime movers, and buses based on parameters like GVW and engine output. Prime mover limits have progressively tightened from approximately 30L/100km in 2024 to 35.5L/100km, representing an overall reduction of around 15%. Similarly, light commercial vehicle limits are classified by kerb weight and seating capacity, reflecting an average tightening of around 10% compared to the previous revision.

Policy Integration and Regulatory Compliance

Commercial vehicle fuel consumption limits complement and extend the dual-credit policy within the commercial vehicle sector. While commercial vehicles are currently exempt from the credit accounting system applied to passenger cars, compliance with these fuel consumption limits remains mandatory. Any model exceeding the stipulated limits will be barred from the Ministry of Industry and Information Technology's (MIIT) "Announcement on Road Motor Vehicle Manufacturing Enterprises and Products", effectively denying it market access and vehicle approval.

In terms of enforcement, MIIT maintains continuous oversight of approved models through Conformity of Production (COP) audits and the mandatory fuel consumption disclosure registry. Non-compliant vehicles identified during COP verifications face statutory penalties and mandatory rectification before re-entry.

Industry Impact and Technological Pathways

Progressively stringent fuel consumption limits are accelerating technological advancements across the commercial vehicle industry. Key engineering pathways include boosting engine thermal efficiency (with manufacturers like Weichai and Yuchai having mass-produced diesel engines boasting 50% thermal efficiency), rolling out 48V mild-hybrid systems across light lorries and buses, widely adopting lightweight construction materials and low rolling resistance tyres, and refining aerodynamic profiles. Meanwhile, the new energy commercial vehicle sector is pursuing multi-powertrain strategies spanning battery-electric (BEV), hydrogen fuel cell (FCEV), and methanol platforms, with electrification adoption surging particularly across municipal, sanitation, and short-haul logistics fleets.