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Draft NotificationEmission and Fuel Regulations

Draft CMVR changes for flex fuel above E85 and related fuel references

The draft proposes updates to CMVR Rule 115 fuel and emission table references, including use of E85 or more, E20 wording, B100 wording and related corrections.

Notification numberG.S.R. 431(E)
Date27 June 2025
Vehicle categoryVehicles covered by the affected CMVR Rule 115 fuel and emission tables
Effective dateOnly after final publication in the Official Gazette; no mandatory date in the draft

Applicability

Applies only to vehicle and engine categories within the specific Rule 115 sub-rules and tables amended by the draft. Product-level applicability requires clause-by-clause mapping.

Key requirements

  • Replace specified E85 references with E85 or more in affected tables.
  • Update referenced gasoline wording to E10 or E20 where proposed.
  • Update the affected biodiesel reference from B10 to B100.
  • Apply the proposed table corrections only after final publication.

OEM impact

  • Review certification fuel strategy, emission families and technical specifications for high-ethanol variants.
  • Update homologation matrices only when a final rule confirms the text and commencement.
  • Assess material, calibration, durability and customer-information implications for fuel blends above E85.

Supplier impact

  • Fuel-system, elastomer, sensor and calibration suppliers should confirm blend compatibility and evidence limits.
  • Emission-control suppliers may need updated ageing and validation assumptions.
  • Documentation should distinguish current production capability from draft regulatory wording.

Testing / homologation impact

  • Certification fuel selection and applicable emission tables require confirmation with the test agency.
  • Additional material, evaporative-emission, OBD or durability evidence may be needed depending on the final text and vehicle category.
  • Existing approvals should be checked for extension implications.

Action points

  • Map every proposed Rule 115 edit to affected products and certificates.
  • Review E85-plus and B100 technical readiness with fuel-system and calibration teams.
  • Record assumptions separately from mandatory compliance requirements.
  • Monitor the Gazette for final publication or superseding text.

Open questions

  • Will the final rule retain all proposed fuel-table edits?
  • What certification fuels and tolerances will be accepted for blends above E85?
  • Will additional AIS or test-procedure amendments accompany the final rule?

Official references

MoRTH draft notification - G.S.R. 431(E)

Disclaimer

This update is an educational engineering summary, not legal advice. Always verify the current Gazette text, amendments, corrigenda, implementation circulars and test-agency interpretations before making a compliance decision.

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