Centre amends motor vehicle rules to allow E85 and E100 ethanol fuel in flex-fuel vehicles
In one line: India has changed its vehicle rules so that cars built for it can run on 85% or nearly 100% ethanol, the next step after reaching 20% blending.
Published 27 October 2026. Written by Pratidin from the reports linked at the end; every fact checked by a separate review before publishing. How we work
The Ministry of Road Transport and Highways (MoRTH) has amended the Central Motor Vehicles Rules, 1989 to recognise E85 (85% ethanol, 15% petrol) and E100 (nearly pure ethanol) as fuels for flex-fuel vehicles. The gazette notification is dated 23 October 2026, and the ministry announced it on 26 October. The changes update emission tables, fuel specifications and testing provisions so that vehicles built for high ethanol blends can be certified (homologated) and sold. A flex-fuel vehicle is one whose engine and fuel system are designed to run on petrol, ethanol or any blend of the two.
The rules carry a clear limit: E85 and E100 can be used only in vehicles specifically designed and certified for them by their manufacturers. Vehicles approved for E20 or ordinary petrol cannot use the higher grades, and existing owners are not required to change fuel or modify their cars. The amendment also raises the weight limit for the light petrol and diesel vehicles covered by the relevant testing provisions from 3,000 kg to 3,500 kg. Maruti Suzuki launched the Wagon R Flex Fuel, described as India's first flex-fuel passenger vehicle able to run on E20 to E100, in June 2026, and other carmakers are reported to be developing such models.
The change builds on India's ethanol blending programme. The National Policy on Biofuels, 2018, amended in June 2022, advanced the target of 20% ethanol in petrol (E20) from 2030 to 2025-26, and India reached 20% blending in 2025. Government figures cited at the time put ethanol production at over 660 crore litres in 2025, up from 38 crore litres in 2014, with foreign exchange savings of about ₹1.36 lakh crore. The government says higher blends cut crude imports and tailpipe emissions. Concerns raised about the push include competition between food and fuel for grain and sugarcane, the small number of flex-fuel models on sale, and the need to judge ethanol by its full life-cycle emissions.
Prelims facts
- MoRTH's amendment to the Central Motor Vehicles Rules, 1989, notified on 23 October 2026, recognises E85 and E100 as fuels for flex-fuel vehicles.
- E85 and E100 may be used only in vehicles designed and certified for them by manufacturers; E20 and petrol vehicles cannot use them.
- The weight limit for the light petrol and diesel vehicles covered by the testing provisions rises from 3,000 kg to 3,500 kg.
- The National Policy on Biofuels, 2018 (amended 2022) advanced the E20 target from 2030 to 2025-26; India reached 20% blending in 2025.
- Maruti Suzuki's Wagon R Flex Fuel (June 2026) is described as India's first flex-fuel passenger vehicle.
Quick recall
- What is E100?
- Fuel that is nearly pure ethanol.
- What is E85?
- A blend of 85% ethanol and 15% petrol.
- Which rules were amended to recognise E85 and E100?
- The Central Motor Vehicles Rules, 1989, by MoRTH (notification dated 23 October 2026).
- Which vehicles may use E85 and E100?
- Only vehicles specifically designed and certified for them by manufacturers (flex-fuel vehicles).
- New weight limit for light petrol and diesel vehicles under the testing provisions?
- 3,500 kg, raised from 3,000 kg.
- When did the 2022 amendment to the biofuel policy set the E20 deadline?
- It advanced the E20 target from 2030 to 2025-26.
- When did India reach 20% ethanol blending?
- In 2025, ahead of the original 2030 target.
- Which car is described as India's first flex-fuel passenger vehicle?
- Maruti Suzuki's Wagon R Flex Fuel, launched in June 2026.
Prelims practice question
With reference to the amendment to the Central Motor Vehicles Rules notified in October 2026, consider the following statements:
1. It recognises E100 as a fuel for vehicles certified by manufacturers as flex-fuel vehicles.
2. It permits all vehicles approved for E20 to run on E85.
3. It requires owners of existing petrol vehicles to convert them to flex-fuel within a deadline.
Which of the statements given above is/are correct?
- 1 only
- 1 and 2 only
- 2 and 3 only
- 1, 2 and 3
Show answer
Answer: (a) 1 only. Only statement 1 is correct. E85 and E100 are limited to vehicles designed and certified for them, so E20 vehicles cannot use E85 (statement 2 is wrong). Existing owners are not required to switch fuel or modify their vehicles (statement 3 is wrong).
Use this in UPSC Mains: previous-year questions
Recurring theme: Biofuels, ethanol blending and India's energy security
- How to use this
Use ethanol blending as an example of reducing crude import dependence while noting its sustainability trade-offs.
- India reached 20% ethanol blending in 2025, five years before the original 2030 target, after the 2022 policy amendment.
- In October 2026 MoRTH amended the CMV Rules, 1989 to recognise E85 and E100 for certified flex-fuel vehicles.
- Food-versus-fuel competition and life-cycle emissions mean feedstocks should shift to surplus and waste biomass.
- How to use this
Cite ethanol blending and the new flex-fuel rules as a clean-fuel pathway towards energy independence.
- Ethanol production rose from 38 crore litres in 2014 to over 660 crore litres in 2025, per government figures.
- E85 and E100 are now recognised for certified flex-fuel vehicles, such as the Wagon R Flex Fuel launched in June 2026.
The same policy's ethanol targets led to E20 and now to E85 and E100 rules; the answer is (a).
Mains practice question
India has achieved 20% ethanol blending in petrol and has now notified rules for E100 flex-fuel vehicles. Discuss the benefits and concerns of moving to higher ethanol blends. (150 words)
Model answer
In October 2026 the Road Transport Ministry amended the Central Motor Vehicles Rules, 1989 to recognise E85 and E100 for certified flex-fuel vehicles, after India reached E20 in 2025.
Benefits
- Energy security: ethanol replaces imported crude; government figures put forex savings from blending at about ₹1.36 lakh crore.
- Farm incomes: sugarcane, damaged grains and other feedstocks under the National Policy on Biofuels, 2018 create demand for farm produce.
- Emissions: the government says higher blends cut tailpipe emissions.
- Industry: clear certification rules for flex-fuel models such as the Wagon R Flex Fuel (June 2026).
Concerns
- Food versus fuel: grain and sugarcane diverted to ethanol can strain food supply and water.
- Limited vehicles: E85 and E100 are only for certified flex-fuel vehicles, of which few are on sale.
- Life-cycle emissions: gains depend on how ethanol is grown and processed.
Higher blends can serve energy security if feedstocks shift to surplus and waste biomass and pump and vehicle supply grow together.
The basics
Why this matters
India imports most of the crude oil it uses. Ethanol, an alcohol made from sugarcane, grain and other biomass, can replace part of the petrol in cars. After reaching 20% blending, the government has now written rules that let specially built cars run on 85% or even nearly 100% ethanol.
The letters and numbers
In fuel names, 'E' stands for ethanol and the number is its percentage. E20 is 20% ethanol and 80% petrol. E85 is 85% ethanol. E100 is nearly pure ethanol. Ordinary cars can handle low blends; high blends need a Flex-fuel vehicle.
How India got to E20
The National Policy on Biofuels, 2018 set a 20% target for 2030. A June 2022 amendment pulled it forward to 2025-26, and India reached 20% in 2025.
- 2014Ethanol production about 38 crore litres
- 2018National Policy on Biofuels sets 20% blending by 2030
- June 2022Amendment advances the E20 target to 2025-26
- 2025India reaches 20% blending; production over 660 crore litres
- June 2026Wagon R Flex Fuel launched as India's first flex-fuel passenger vehicle
- 23 October 2026Motor vehicle rules amended to recognise E85 and E100
What the new rules change
The Central Motor Vehicles Rules, 1989 decide how vehicles are tested and approved. The amendment updates emission tables, fuel specifications and testing provisions for E85 and E100, so carmakers have a clear path to certify flex-fuel models.
- Can run on E85 or E100
- Designed and certified by the manufacturer for high blends
- Cannot use E85 or E100
- Owners need not change fuel or modify the car
The trade-offs
Ethanol saves foreign exchange and supports farmers, but it competes with food and water when made from grain and sugarcane. Its climate benefit depends on how it is produced, so it should be judged by its whole life cycle, not just the tailpipe.
Go deeper
Why it matters for UPSC
Ethanol blending links energy security, agriculture, pollution and climate. Prelims has asked about biofuel feedstocks, and Mains asks about energy security and clean fuels.
The core idea
The National Policy on Biofuels, 2018 drove blending to E20 by 2025. Going further needs engines built for high blends: the Flex-fuel vehicle. Such vehicles must be tested and approved under the Central Motor Vehicles Rules, 1989, which have now been amended for E85 and E100. The fuel itself is described in Ethanol as a transport fuel.
Numbers and dates to remember
- Notification dated 23 October 2026; announced 26 October 2026.
- E85 and E100 only for vehicles designed and certified for them.
- Weight limit for the light vehicles covered: 3,000 kg raised to 3,500 kg.
- E20 target advanced from 2030 to 2025-26 in June 2022; reached in 2025.
- Ethanol production: 38 crore litres (2014) to over 660 crore litres (2025).
Where to go next
- National Policy on Biofuels, 2018: the targets and feedstocks.
- Flex-fuel vehicle: why only some cars can use E100.
- Central Motor Vehicles Rules, 1989: the rulebook that was amended.
- Ethanol as a transport fuel: what ethanol is and its trade-offs.
Go deeper: how far should India push ethanol?
The case for higher blends:
- Energy security: every litre of ethanol replaces imported petrol. Government figures put forex savings from blending at about ₹1.36 lakh crore.
- Farm demand: the National Policy on Biofuels, 2018 lets sugarcane, damaged grains and other biomass become fuel.
- Industrial readiness: the amended Central Motor Vehicles Rules, 1989 give carmakers a clear route to certify a Flex-fuel vehicle.
The concerns:
- Food and water: sugarcane and grain used for fuel compete with food and need heavy irrigation.
- Vehicle base: E85 and E100 are only for certified flex-fuel vehicles, and few models are on sale.
- Climate accounting: Ethanol as a transport fuel cuts some tailpipe emissions, but the full benefit depends on farming, processing and transport, so life-cycle assessment matters.
- Consumer clarity: owners of ordinary cars must know which grades their engines can take.
A balanced answer: support high blends where flex-fuel vehicles exist, but shift feedstock towards surplus and waste biomass, keep food security first, and measure climate gains across the life cycle.
National Policy on Biofuels, 2018
The targets and feedstocks behind ethanol blending.
In one line: The 2018 policy is India's framework for producing and using biofuels, including ethanol for blending with petrol.
Targets
It set a target of 20% ethanol in petrol by 2030. A June 2022 amendment advanced this to 2025-26 and widened the feedstocks eligible for biofuel production. India reached 20% blending in 2025.
Feedstocks
Permitted raw materials for ethanol include sugarcane juice, sugar beet, cassava, damaged food grains unfit for human consumption, rotten potatoes, and surplus food grains. In Prelims 2020, UPSC asked which items the policy allows; groundnut seeds and horse gram are not listed.
Why it is in the news
The new E85 and E100 rules extend the blending drive beyond E20.
Where to go next
National Policy on Biofuels, 2018: every story that connects to it (2)
Flex-fuel vehicle
Why only some cars can use E100.
In one line: A flex-fuel vehicle has an engine and fuel system designed to run on petrol, ethanol or any blend of them.
How it differs
Engines and fuel systems must be built and certified for high ethanol blends. That is why the amended rules say E85 and E100 may be used only in vehicles specifically designed and certified by manufacturers.
In India
Maruti Suzuki launched the Wagon R Flex Fuel in June 2026, described as India's first flex-fuel passenger vehicle able to run on E20 to E100. Other carmakers are reported to be developing models.
Why it is in the news
The rule change gives such vehicles a legal route to be certified and sold.
Where to go next
Central Motor Vehicles Rules, 1989
The rulebook that was amended.
In one line: The Central Motor Vehicles Rules, 1989, made under the Motor Vehicles Act, set national standards for vehicle registration, safety, emissions and testing.
What they cover
They include emission limits and test procedures that a vehicle model must meet before it is approved for sale, a process called type approval or homologation. The Ministry of Road Transport and Highways amends them by notification.
The October 2026 change
The amendment, dated 23 October 2026, updates emission tables, fuel specifications and testing provisions to cover E85 and E100. It limits these fuels to certified flex-fuel vehicles and raises the weight limit for the light petrol and diesel vehicles covered from 3,000 kg to 3,500 kg.
Where to go next
Ethanol as a transport fuel
What ethanol is and its trade-offs.
In one line: Ethanol is an alcohol made by fermenting sugars from crops and biomass, and it can replace part of the petrol in vehicles.
Where it comes from
In India most ethanol comes from sugarcane (juice, syrup or molasses) and grains. Second-generation ethanol can be made from crop residue and other non-food biomass.
Benefits and limits
It reduces crude imports and can cut some tailpipe pollutants. But crops for ethanol use land and water, and grain used for fuel can compete with food. Its climate benefit depends on how it is grown, processed and transported, so experts judge it by life-cycle emissions.
Why it is in the news
With E20 achieved, the rules now allow E85 and E100 in flex-fuel vehicles.
Where to go next
Take the 27 October 2026 quiz: 30 Prelims-style questions with answers