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Fuel Systems

The 2026 fuel system regulations introduce revolutionary changes centered on 100% sustainable fuels, while maintaining strict controls on fuel specifications, tank design, fuel flow, and refueling procedures.

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100% Sustainable Fuel

Revolutionary Change for 2026: Formula 1 transitions to 100% sustainable fuels with zero net carbon footprint, representing a major step toward the sport’s net-zero carbon goal by 2030.

Advanced Biofuels

Derived from sustainable biomass sources - agricultural waste, algae, municipal waste

Synthetic E-Fuels

Produced from captured CO₂ and renewable electricity through power-to-liquid technology

Drop-In Compatible

Works with existing ICE technology - no engine modifications required

Zero Net Carbon

Carbon released during combustion equals carbon captured during production

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Fuel Specifications

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Chemical Properties

Strict Compliance Required: All fuel samples are analyzed by the FIA-designated laboratory. Non-compliant fuel results in disqualification from the event.

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Fuel Approval Process

1

Sample Submission

Team submits 20-liter fuel sample to FIA minimum 14 days before first use
2

Laboratory Analysis

FIA-designated laboratory conducts full chemical analysis
  • Spectroscopy (IR, NMR)
  • Gas chromatography-mass spectrometry (GC-MS)
  • Density and distillation profile
  • Octane number testing
3

Reference Sample

FIA retains reference sample for comparison during events
4

Approval Certificate

If compliant, FIA issues fuel approval certificate valid for season

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Fuel Testing at Events

Pre-Event

Teams declare fuel supplier and specification

Random Sampling

FIA may sample fuel from any car at any time

Rapid Testing

Infrared spectroscopy for quick compliance check

Post-Session

Detailed analysis if discrepancies detected

Sealed Samples

Counter-samples sealed for potential appeals

Results

Non-compliance reported to stewards immediately

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Fuel Tank

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Fuel Cell Specifications

Fuel Cell (Safety Tank) Requirements: The fuel tank must be a FIA-approved safety fuel cell (bag tank) meeting FIA/FT specifications.
Fuel cells must be replaced every 5 years or after significant impact, whichever comes first.

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Tank Design and Protection

Structural Protection:
  • Fuel cell enclosed in survival cell or deformable structure
  • Impact-absorbing foam surrounding tank
  • Minimum 30mm crushable structure protection
  • Fire-resistant bulkheads separating tank from cockpit and engine
Crash Testing:
  • Fuel tank installation must pass FIA crash tests
  • Front and rear impact tests simulate severe accidents
  • Puncture resistance testing
  • Fire integrity testing

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Fuel Cell Components

Filler Cap

Single, centrally-located filler cap with dry-break connector

Venting

Non-return valves prevent fuel spillage during rollover

Collector Tank

Ensures fuel pickup under high G-forces

Baffles

Internal baffles prevent fuel surge

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Fuel Flow Monitoring

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Fuel Flow Limit

Maximum fuel flow rate: 100 kg/hour This limit is absolute and must not be exceeded at any engine RPM.
Measurement:
  • Monitored by FIA-spec fuel flow meter
  • Sampling rate: 2,000 measurements per second
  • Installed in fuel line between tank and engine
  • Data transmitted to FIA in real-time

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FIA Fuel Flow Meter

1

Installation

Single FIA-mandated fuel flow sensor installed in fuel supply line
2

Calibration

Pre-event calibration by FIA technical delegate
3

Sealing

Sensor sealed by FIA to prevent tampering
4

Real-Time Monitoring

Continuous data transmission to FIA monitoring system
5

Alerts

Any exceedance triggers immediate alert to race control
Technical Details:
  • Manufacturer: FIA-approved supplier only
  • Technology: Ultrasonic or Coriolis measurement
  • Accuracy: ±0.25% of reading
  • Response time: <5 milliseconds
  • Operating temperature: -40°C to +125°C
  • Fuel compatibility: All approved F1 fuels

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Fuel Flow Violations

Penalties for Fuel Flow Exceedance:
  • Consistent violations: Disqualification from session/race
  • Technical infringement: Potential championship point deductions
  • Deliberate circumvention: Severe penalties including exclusion

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Fuel System Architecture

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Fuel Supply System

1

Fuel Tank

Main fuel cell (maximum 110kg capacity)
2

Low-Pressure Pump

Electric fuel pump in collector tank (lifts fuel from main tank)
3

Fuel Filter

Removes contaminants to protect injection system
4

FIA Fuel Flow Meter

Monitors and limits fuel flow rate
5

High-Pressure Pump

Engine-driven pump increases pressure for direct injection
6

Fuel Rail

Distributes fuel to injectors at 500 bar pressure
7

Injectors

One direct injector per cylinder delivers precise fuel quantity

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Fuel Pumps

Low-Pressure Stage

Electric pump: Maximum 8 bar, supplies high-pressure pump

High-Pressure Stage

Mechanical pump: Up to 500 bar for direct injection system
Fuel pump pressure is monitored by FIA sensors to ensure compliance with injection system limits.

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Refueling

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Refueling Prohibition

Refueling during races is PROHIBITEDCars must complete the race on fuel loaded before the start (maximum 110kg).
Historical Context: Refueling was banned in 2010 for safety and cost reasons. The 2026 regulations maintain this prohibition.

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Permitted Fueling Operations

Permitted Fueling Scenarios:
  1. Garage Fueling:
    • In team garage with approved equipment only
    • During practice and qualifying sessions
    • Before race start in pit lane
  2. Safety Requirements:
    • Minimum 2 fire extinguishers present
    • Fire-resistant clothing for all personnel
    • Fuel rig operator certified by FIA
    • Dead-man switch on fueling equipment
  3. Prohibited:
    • Fueling during race (pit stops or otherwise)
    • Fueling with engine running
    • Fueling on track
    • Any form of fuel transfer between cars

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Fuel Rig Specifications

1

FIA Approval

Fuel rig must be FIA-approved type with safety certifications
2

Dry-Break Connector

Self-sealing connector prevents spillage
3

Flow Rate

Maximum fueling rate regulated for safety
4

Dead-Man Switch

Automatic shut-off if operator releases trigger
5

Fire Suppression

Built-in fire suppression system in fuel rig

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Fuel Temperature

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Temperature Limits

Fuel Temperature Regulations:
  • Maximum fuel temperature: 10°C above ambient temperature
  • Measured in fuel tank before and after sessions
  • Monitored by FIA temperature sensors
Fuel cooling systems are prohibited. Fuel temperature must not be artificially reduced below ambient.

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Temperature Monitoring

Pre-Session

FIA measures fuel temperature before car leaves garage

Post-Session

Random checks after sessions to detect cooling

Ambient Reference

FIA establishes ambient temperature for each session

Tolerance

Maximum +10°C above ambient allowed
Why Fuel Temperature is Regulated:
  • Cooler fuel is denser (more mass per volume)
  • Teams could gain fuel mass advantage by cooling
  • Limit prevents expensive fuel cooling systems
  • Ensures fair competition and cost control

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Fuel Quantity Monitoring

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Fuel Mass Measurement

1

Pre-Session Weighing

Car weighed, fuel tank filled, car re-weighed to determine fuel mass
2

Declaration

Team declares fuel load to FIA before session
3

FIA Verification

FIA verifies fuel load matches declaration
4

Post-Session Check

Random fuel drain and measurement to verify consumption
Fuel consumption data combined with fuel flow meter data allows FIA to detect anomalies or illegal fuel additives.

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Fuel Sampling Procedures

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Sample Collection

The FIA may collect fuel samples:
  • At any time during an event
  • From any location in fuel system
  • Minimum 500ml sample required
  • Sealed in presence of team representative

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Sample Analysis

FIA Laboratory Procedures:
  1. Initial Screening:
    • Infrared spectroscopy comparison with reference
    • Density measurement at 15°C
    • Visual inspection
  2. Detailed Analysis (if required):
    • Gas chromatography-mass spectrometry (GC-MS)
    • Nuclear magnetic resonance (NMR) spectroscopy
    • Elemental analysis
    • Distillation profile
  3. Comparison:
    • Event sample vs. reference sample
    • Statistical analysis of any differences
  4. Reporting:
    • Results reported to FIA Technical Delegate
    • If non-compliant, reported to stewards

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Prohibited Fuel System Devices

The following are explicitly prohibited:
  • Any device that stores fuel outside the fuel cell
  • Fuel cooling systems (chillers, heat exchangers)
  • Variable geometry fuel delivery systems
  • Fuel additives not approved by FIA
  • Devices that could meter fuel beyond flow meter
  • Bypass lines around fuel flow meter
  • Any modification to FIA-mandated sensors
  • Exotic materials in fuel system (except safety fuel cell)

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Common Violations and Penalties

Stewards have discretion to apply appropriate penalties based on severity and whether violation was deliberate.

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Fuel Sample Requirements

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Minimum Fuel Requirement

Critical Rule: At the end of qualifying, cars must have at least 1.0 liter of fuel available for FIA sampling.Insufficient fuel results in disqualification from qualifying session.
This rule prevents teams from running dangerously low fuel loads to achieve lighter weight during qualifying laps.

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Fuel System Safety

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Fire Prevention

Leak Detection

Sensors detect fuel leaks and alert driver/team

Automatic Shut-Off

Fuel pumps cut in case of accident/fire detection

Fire-Resistant Lines

All fuel lines use fire-resistant materials

Segregation

Fuel system isolated from electrical components

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Crash Safety

1

Impact Detection

Crash sensors detect significant impacts
2

Automatic Isolation

Fuel pumps shut off immediately
3

One-Way Valves

Prevent fuel spillage from tank
4

Fire Suppression

Onboard fire extinguisher system activated

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Sustainable Fuel Development

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Technology Roadmap

F1’s Sustainable Fuel Initiative:Formula 1 is working with fuel suppliers and the FIA to develop sustainable fuels that will:
  • Achieve true zero net carbon lifecycle
  • Be scalable for global road car adoption
  • Maintain or exceed current performance levels
  • Be cost-competitive with fossil fuels

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Fuel Production Pathways

Advanced Biofuels:
  • Agricultural waste (straw, corn stover)
  • Forestry residues
  • Municipal solid waste
  • Algae cultivation
  • Carbon capture from biomass facilities
Synthetic E-Fuels:
  • Direct air capture (DAC) of CO₂
  • Renewable electricity (wind, solar, hydro)
  • Electrolysis produces hydrogen
  • Fischer-Tropsch synthesis combines H₂ + CO₂
  • Result: Drop-in hydrocarbon fuels
Both pathways must demonstrate lifecycle carbon neutrality through independent verification.

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Road Relevance

Global Impact:F1’s development of 100% sustainable fuels has significant implications:
  • Over 1 billion cars globally could use these fuels
  • No engine modifications required (drop-in compatibility)
  • Faster decarbonization than full EV transition alone
  • Particularly important for heavy transport and aviation
  • Technology transfer accelerates commercial adoption

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Fuel Suppliers (2026)

Formula 1 teams work with major fuel suppliers for 2026:

Shell

Ferrari partnership

Petronas

Mercedes partnership

ExxonMobil

Red Bull partnership

BP/Castrol

Aston Martin/Honda partnership

TotalEnergies

Alpine partnership
All fuel suppliers must meet the same FIA specifications - fuel formulation is an area of technical competition within regulatory bounds.

Power Unit

Power unit specifications and fuel system integration

Safety

Fire safety systems and crash fuel cell protection

Electronics

Fuel flow monitoring and sensor systems