Vehicle Fuel Consumption Limits

Vehicle fuel consumption limits refer to mandatory national technical standards formulated to regulate fuel consumption and drive energy conservation and emissions reduction. They define the maximum fuel consumption caps that newly manufactured vehicles must adhere to during type approval and Conformity of Production (COP) audits. This regulatory standard forms a cornerstone of China's automotive energy-saving framework, working alongside the "Corporate Average Fuel Consumption Calculation Method for Passenger Cars" and the Dual-Credit Policy to establish a two-tier oversight mechanism spanning individual models and corporate fleet levels.

Current Standards and Test Cycles

The current mandatory national standard for light-duty vehicle fuel consumption in China is GB 19578—2021 "Limits of Fuel Consumption for Passenger Cars", implemented on 1 July 2021 for Category M1 passenger vehicles with a maximum design gross vehicle weight (GVW) not exceeding 3,500 kg. This standard sets the fuel consumption ceiling for single-model type approval, barring non-compliant models from receiving official vehicle homologation listing.

Fuel consumption testing adheres to GB/T 19233—2020 "Measurement Methods of Fuel Consumption for Light-duty Vehicles", deploying the WLTC (Worldwide Harmonised Light Vehicles Test Cycle). Replacing the older NEDC test cycle, the WLTC delivers figures that reflect real-world driving conditions more accurately. Under this standard, vehicles are categorised by kerb weight (CM), with heavier weight brackets assigned higher fuel consumption limits.

Effective 1 January 2026, models listed under the "Catalogue of New Energy Vehicle Models Exempted from Vehicle Purchase Tax" must meet revised energy consumption requirements—the power consumption per 100 km for battery electric passenger cars (EVs) must not exceed the respective model caps specified in "Energy Consumption Limits for Electric Vehicles Part 1: Passenger Cars" (GB 36980.1—2025). This regulatory shift recalibrates NEV oversight from merely chasing pure driving range to balancing both range and efficiency, compelling manufacturers to reduce real-world energy consumption rather than simply packing in larger battery packs.

Corporate Average Fuel Consumption Management

Beyond single-vehicle caps, China enforces the "Corporate Average Fuel Consumption Calculation Method for Passenger Cars", regulating the weighted average fuel economy across an automaker's entire local production and import lineup. An automaker's actual Corporate Average Fuel Consumption (CAFC) must meet its annual compliance target, calculated based on the individual model target figures and corresponding production volumes. If a manufacturer's actual average exceeds the target threshold, negative fuel credits are incurred, which must be offset through internal carryovers, transfers from affiliated entities, or purchasing New Energy Vehicle (NEV) credits.

This framework, along with NEV credits, constitutes the Dual-Credit Policy, exerting dual pressure on manufacturers: compelling continuous fuel savings in conventional petrol and diesel vehicles while mandating the steady expansion of new energy vehicle output. In 2024, the industry's actual average fuel consumption ticked up to 3.38 L/100 km, expanding total negative fuel credits to 9.412 million points. Non-compliant manufacturers failing to clear their credit deficits within the stipulated timeframe face penalties, including the suspension of type approval applications and production halts for high-consumption models.

Energy Consumption Labels for Different Models

Since 2010, every vehicle sold in China must display an official Vehicle Fuel Consumption Label, detailing urban, extra-urban, and combined fuel consumption figures. The combined fuel consumption rating serves as a direct benchmark for car buyers comparing the fuel efficiency of different models. It should be noted that these figures are derived under standardised laboratory conditions, meaning real-world fuel consumption is typically higher than the rated value. In 2026, the Ministry of Industry and Information Technology (MIIT) organised industry bodies to draft the "Passenger Car Fuel Consumption Indicators", aiming to establish energy efficiency benchmarks to assess product competitiveness and enhance the supporting framework of fuel consumption standards.

Industry Impact and Development Trends

The continuous tightening of fuel consumption caps remains a key catalyst for automotive powertrain technology upgrades. To meet increasingly stringent regulatory limits, carmakers continue to deploy hybridisation, 48V mild-hybrid systems, high thermal efficiency engines, low-rolling-resistance tyres, and vehicle lightweighting. In June 2026, the First Equipment Industry Department of MIIT convened a symposium with industry organisations, including the China Automotive Technology and Research Centre (CATARC), to deliberate on standard refinements. Driven by national carbon peak and neutrality goals, fuel consumption regulations are tightening further, harmonising with NEV credit quota mandates and zero-emission vehicle transition strategies to accelerate the automotive industry's green transformation.