Archive · 26 Jul 2026
E20 petrol woes persist for older cars
More than a year after India started using E20 petrol, many older car owners are still having problems.
A big survey found that most of these car owners say their cars now use more fuel and need more repairs.
The government says E20 petrol is safe and only slightly reduces fuel efficiency, but many people disagree.
There was even a court case where a car company had to replace a car that had problems because of E20 petrol.
India is also planning to use even more ethanol in petrol in the future.
67% of pre-2023 petrol vehicle owners report over 10% mileage drop with E20 petrol.
45% of owners experience increased wear and tear and frequent repairs.
Government estimates mileage reduction of 3% to 5% in older vehicles, contrasting with survey findings.
Consumer court orders Maruti Suzuki to replace a vehicle or refund owner due to E20-related issues.
India is preparing for higher ethanol blends like E25 as part of its energy transition strategy.
- Who
- Owners of pre-2023 petrol vehicles and the Indian government
- What
- Persistent issues with E20 petrol, including mileage decline and increased maintenance
- When
- Survey conducted after April 2025 nationwide rollout of E20 petrol
- Where
- India
- Why
- India's energy transition strategy and push for higher ethanol blends
Vehicle Owners
Government and Industry
Mileage Decline
Vehicle Owners
67% of pre-2023 petrol vehicle owners report over 10% mileage drop, with nearly 25% experiencing over 20% decline.
Government and Industry
Government estimates mileage reduction of 3% to 5% in older vehicles, with ARAI tests showing 2% to 6% reduction.
Vehicle Maintenance
Vehicle Owners
45% of owners report increased wear and tear, including engine issues and frequent repairs.
Government and Industry
Government agencies claim no abnormal engine wear in vehicles built to standards when using E20.
Fuel Quality
Vehicle Owners
LocalCircles suggests possible fuel adulteration or contamination beyond ethanol blending.
Government and Industry
Government and industry maintain E20 is within safety standards and no conclusive evidence of engine damage.
- Survey Respondents
- 45,000+ owners of pre-2023 petrol vehicles
- Mileage Decline
- 67% report over 10% drop, 25% report over 20% drop
- Maintenance Issues
- 45% report increased wear and tear
- Consumer Court Ruling
- Maruti Suzuki ordered to replace vehicle or refund owner
- Government Position
- E20 petrol reduces mileage by 3% to 5% in older vehicles
- Future Blends
- India preparing for E25 and higher ethanol blends