E20 petrol may trim mileage by 2–6% in older vehicles, ministries say
India’s Road Transport and Petroleum ministries say nationwide E20 petrol use can reduce fuel economy by roughly 2–6% in vehicles engineered for E10, depending on age, type and driving conditions. The assessments, supported by Indian Oil and industry bodies, reject claims of far steeper mileage losses.
Indian ministries said E20 petrol may cut mileage in older E10-designed vehicles by 2-6% or 3-5%, depending on vehicle type, age and use conditions, while rejecting claims of steep losses. Indian Oil participated in the supporting assessments.
Why this matters
The E20 assessment follows warnings that pre-2016 BS-III vehicles may need rubber-part replacements and comes as India-bound Saudi crude tankers go dark in the Red Sea, keeping fuel compatibility, costs and supply risk in focus for Indian Oil.
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