Road Transport Ministry amends CMVR to certify E100 flex-fuel vehicles
The Ministry of Road Transport and Highways has amended the Central Motor Vehicles Rules, 1989, so that flex-fuel vehicles can be certified for E100, almost pure ethanol, besides E85. Certified vehicles must meet their category's emission and safety norms. The change, announced on 26 October 2026, covers only specially designed vehicles; existing vehicles need no switch or conversion.
Syllabus: GS3 · Infrastructure; GS2 · Government Policies; GS3 · Science & Technology
Why this matters for UPSC
GS3 energy and infrastructure. Prelims can ask what E85 and E100 mean and what the National Policy on Biofuels, 2018 provides; GS3 Mains, whether ethanol can cut crude imports without hurting food and water security.
Why it matters
A family buying a car or a two-wheeler in the next few years may find a flex-fuel model on sale. It could run on petrol, on nearly pure ethanol or on any mix of the two, filling whichever is cheaper per kilometre. Owners of today's cars lose nothing: they are not told to convert, and must not fill E85 into a car built for E20. For sugarcane and grain farmers and distillers, a larger ethanol market can mean steadier demand. For the country, every litre of home-made ethanol is a litre of crude oil not bought abroad when wars disturb supply. The catch is mileage, water-hungry crops and the food-versus-fuel trade-off.
Prelims pointers
- National Policy on Biofuels, 2018: notified by the Ministry of Petroleum and Natural Gas on 4 June 2018, superseding the 2009 policy of the Ministry of New and Renewable Energy.
- Biofuel classes under the 2018 policy: basic (1G bioethanol, biodiesel) and advanced (2G ethanol, municipal solid waste to drop-in fuels, 3G biofuels, bio-CNG).
- Policy's 2022 amendments (Cabinet, 18 May 2022): 20% blending target advanced to ethanol supply year 2025-26 from 2030; SEZ and EOU units may produce biofuels.
- Permitted ethanol feedstocks: sugarcane juice, sugar beet, sweet sorghum, corn, cassava, damaged wheat and broken rice, rotten potatoes; surplus food grains need the coordination committee's approval.
- Second-generation (2G) ethanol bio-refineries: the 2018 policy indicated viability gap funding of Rs 5,000 crore over six years.
- Biodiesel: the 2018 policy encourages supply chains from non-edible oilseeds, used cooking oil and short-gestation crops.
- Ethanol has a higher octane rating than petrol, so it resists knocking; it also carries less energy per litre, so mileage falls as its share rises.
Practise a UPSC-style question
With reference to the 2026 amendment of the Central Motor Vehicles Rules, 1989 on flex-fuel vehicles, consider the following statements:
1. It was notified by the Ministry of Petroleum and Natural Gas to permit certification of vehicles for E100.
2. It does not require owners of existing petrol vehicles to switch to E85 or modify their vehicles.
Which of the statements given above is/are correct?
- (a) 1 only
- (b) 2 only
- (c) Both 1 and 2
- (d) Neither 1 nor 2
Show the answer
Answer: (b) 2 only
Answer: (b) 2 only. The amendment came from the Road Transport Ministry and leaves existing vehicles untouched.
Statement 1: incorrect. The Ministry of Road Transport and Highways, which frames the Central Motor Vehicles Rules, 1989, notified the amendment, not the petroleum ministry.
Statement 2: correct. The ministry says the notification does not require existing owners to switch to E85 or modify their vehicles, now or later.
Eliminate: statement 2 is correct, as the release says. Out: (a), (d).
Eliminate: statement 1 names the wrong ministry. Out: (c).
Trap: Swapped attribution. Ethanol policy belongs to the petroleum ministry, so a student may pin the vehicle rule on it too.
Remember: Vehicle rules are MoRTH's; biofuel policy is MoPNG's.
Explainers on this topic
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