India’s government has updated its motor vehicle rules to allow E100, fuel made of up to 100% ethanol, in flex-fuel vehicles. Existing E20 cars stay compatible with today’s petrol and are not meant to run on E100.
What Is Changing E100 Ethanol
Reports on X, including this trending summary, say the amendment was notified on October 23. It follows Union minister Nitin Gadkari’s approval of the E100 framework in June, shortly after Maruti Suzuki showed a flex-fuel Wagon R and Hero MotoCorp showed ethanol-compatible bikes.
| Point | Details |
|---|---|
| Fuel allowed | E100 (up to 100% ethanol) in flex-fuel vehicles |
| Existing cars | E20 vehicles stay compatible with current fuel and should not use E85 or E100 |
| Higher blends | E20-plus fuels only in flex-fuel vehicles |
| First pumps | Reportedly Delhi-NCR and Mumbai-Pune-Nagpur routes |
| Claimed savings | Reportedly ₹25 to ₹30 a litre (unverified) |

Why It Matters
- Oil imports: India imports over 85% of its crude oil, so more ethanol could ease the import bill.
- Farmers: Demand for ethanol supports the sugar and bio-energy sector.
- Brazil model: Flex-fuel cars that run on any petrol-ethanol mix are common there.
The Catches
- Flex-fuel vehicles need different engine calibration and fuel-system parts, so ordinary cars cannot simply switch.
- Dealers expect early sales to be mostly two-wheelers, and pump coverage will start small.
- Critics worry that more sugarcane for fuel could affect food supplies and prices.
Read about flex-fuel vehicles and ethanol fuel. More news is on TechnoSports.
Frequently Asked Questions
Can my current petrol car run on E100?
No. Existing E20-compatible vehicles need major changes to run on E100, which is why dedicated flex-fuel vehicles are required.
When will E100 pumps open?
Initial pumps are reportedly planned for Delhi-NCR and the Mumbai-Pune-Nagpur corridor. No dates are confirmed. Sources: X trending summary, Autocar India, The Wire.





