E20 petrol may cut mileage by up to 5% but offers cleaner combustion, energy security benefits: Ministry
The Indian Oil Ministry has defended the nationwide rollout of E20 ethanol-blended petrol, acknowledging a minor 3-5% reduction in fuel efficiency while highlighting benefits like cleaner emissions and energy security. The Ministry cited extensive testing and manufacturer feedback to dismiss concerns regarding engine damage in older vehicles.
Petrol blended with 20% ethanol (E20) can reduce fuel economy by 3-5% in some vehicles, the Oil Ministry said on Friday (July 10, 2026), but argued the impact is outweighed by benefits, including a higher octane rating, superior anti-knock characteristics, faster combustion, better pickup, smoother acceleration, cleaner engine operation, and lower lifecycle carbon emissions.
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