E20 petrol cuts mileage by up to 5% in older vehicles, govt tells Parliament
UPSC / SSC current affairs note · IR
Why in news
The Indian government informed Parliament that E20 petrol may reduce fuel efficiency by 3-5% in older vehicles designed for E10, but no evidence of engine damage. This clarifies concerns as India pushes higher ethanol blending.
Background
India aims to achieve 20% ethanol blending in petrol by 2025-26 under the National Policy on Biofuels. E20 petrol (20% ethanol, 80% petrol) is being introduced gradually, with compatibility standards for new vehicles.
Key facts
E20 petrol may reduce mileage by 3-5% in older vehicles originally designed for E10.
No evidence of widespread engine damage or breakdowns from E20 use.
E15+ petrol has been used for over 3.5 years; E19 and E20 for over 2.5 years.
Over 20 crore two-wheelers and 3 crore petrol cars running on ethanol blends without verified engine failures.
One leading carmaker serviced 2.84 crore vehicles in 2025-26, including 1.5 crore older non-E20 certified vehicles, without ethanol-related damage.
A leading two-wheeler manufacturer reported no higher damage rate with E20.
Automakers honour warranties when customers use E20-compliant fuel.
Laboratory and field trials showed no significant performance issues in older vehicles.
Government has no plans to revert to E0 or E10 petrol.
Maintaining separate supply chains for E0, E10, and E20 across over 1 lakh retail outlets is not feasible.
Prelims pointers
- E20 petrol: 20% ethanol, 80% petrol blend
- National Policy on Biofuels (2018) targets 20% ethanol blending by 2025-26
- Ministry of Petroleum and Natural Gas
- Rajya Sabha reply by Minister Suresh Gopi
- E10: 10% ethanol blend
- Ethanol blending program under National Biofuel Policy
Mains angles
- GS3: Environment – Ethanol blending as a renewable energy strategy, impact on fuel efficiency and emissions.
- GS3: Science and Technology – Compatibility of older vehicles with new fuel blends, engine performance.
- GS2: Government Policies – Implementation challenges of ethanol blending, supply chain logistics.
- GS3: Economy – Impact on oil import bill, agricultural benefits from ethanol production.