E20 rollout sparks consumer issues: Mileage dip, engine woes reported — what car owners say about use of ethanol-blended petrol

The nationwide rollout of 20 per cent ethanol-blended petrol (E20) has triggered a wave of questions and issues from automobile owners, with many claiming declining gas effectivity, sluggish efficiency and better upkeep prices. Service centres say non-E20-compliant autos — which nonetheless account for a majority on Indian roads — are going through engine put on and gasket failures, forcing customers to recalibrate or change elements.Car owners had been quoted by Economic Times an their expertise and opinion on authorities’s Ethanol-based gas. Mileage and efficiency hit? Rahul Vaidya, who owns a 2019 Volkswagen Vento, noticed his car’s mileage fall from 11–12 kmpl to 7–8 kmpl. “The ride felt heavier, and the response wasn’t as crisp,” he mentioned, earlier than a service centre confirmed his car wasn’t E20-compliant. After changing crucial parts and recalibrating the engine, efficiency was restored. Mahesh Nair, who drives a 2021 Suzuki Brezza, reported the same drop of over 20 per cent in mileage, together with jerky drives and poor pick-up. His automobile required ECU tuning and E20-compatible elements to resolve the problems. “I had no idea my car wasn’t ready for E20 in the first place,” he mentioned. Industry executives estimate non-E20 autos might even see gas effectivity fall by round 7 per cent, whereas official research, together with these by the Automotive Research Association of India (ARAI) and the Petroleum Ministry, peg the drop at 1–6 per cent. ARAI director Reji Mathai mentioned subject trials had proven “no abnormalities,” although some plastics and elastomers did degrade below testing.Policy push vs consumer consciousness The ethanol-blending programme is central to India’s vitality technique. From April 2023, all new autos had been required to be E20-compliant, with stricter enforcement starting April 2025. Yet, 9 out of ten vehicles at present on the street are solely E10-ready, designed to deal with a most of 10 per cent ethanol. Consumers, nonetheless, seem largely unaware. “There’s a glaring gap in awareness. OEMs must educate car buyers. Consumers are stakeholders too,” mentioned Naveen Soni, former president of Lexus India. Two-wheeler maker Hero MotoCorp has issued advisories warning older autos may have modifications to run easily on E20. Some automakers have additionally hinted warranties might not maintain for autos working on greater ethanol blends. Oil firms keep components are being launched to restrict corrosion. Brazil’s decades-long expertise with flex-fuel know-how is commonly cited as a mannequin, although specialists word India’s consumer transition is proving extra abrupt. For the federal government, the programme has saved over Rs 1.44 lakh crore in overseas alternate since 2014, substituted 245 lakh metric tonnes of crude, and lower CO₂ emissions by the equal of planting 30 crore timber. Ethanol demand has additionally boosted sugarcane farmers’ incomes, with funds this 12 months alone anticipated to the touch Rs 40,000 crore. But for automobile owners, the instant influence is greater gas payments and repairs. “E20 has a lower heat content than pure petrol, so a marginal drop in fuel efficiency is inevitable,” mentioned IV Rao, Distinguished Fellow at TERI. “The extent will vary by manufacturer and model, but consumers must not be left in the dark.”