Leader Financial Adviser V Anantha Nageswaran has recommended making E10 petrol to be had once more for older cars whilst permitting more moderen cars designed for upper ethanol blends to proceed the usage of E20.
The proposal comes amid a rising debate over the national use of E20 petrol, with homeowners of older cars elevating issues over gas financial system, compatibility and the long-term have an effect on of upper ethanol blends on car parts.
Nageswaran made the recommendation in a column co-authored with Akash Poojari, a specialist with the Division of Financial Affairs. The authors argued that the answer needn’t be a rollback of India’s ethanol-blending programme, however a extra versatile means that takes into consideration the rustic’s present car fleet.
“Restoring a decrease mix on the pumps, say, E10, along the choice to shop for E20, would calm maximum public fear,” Nageswaran wrote.
In step with the authors, India has an estimated 75-80 million older two-wheelers that had been constructed for E10 gas. Many older cars, in particular the ones supplied with carburettor-based engines, weren’t designed to function with upper ethanol concentrations.
Nageswaran, alternatively, rejected the wider recommendation that E20 is inherently destructive to engines. He famous that ethanol accommodates much less calories than petrol and, as a result, some aid in gas financial system is anticipated. He estimated the energy-related have an effect on of E20 at round 6-7%.
The worry is extra pronounced for older cars, he stated. Carburettor engines won’t mechanically regulate to the extra oxygen related to ethanol, whilst older rubber seals and different fuel-system parts won’t were designed for upper ethanol concentrations.
What’s the E20 debate?
E20 petrol accommodates 20% ethanol and 80% petrol. India has greater ethanol mixing as a part of efforts to scale back crude oil imports, reduce dependence on imported gas and enhance home agricultural manufacturing.
Since April 2026, petrol offered around the nation has been mandated to include 20% ethanol.
The federal government has defended the coverage, announcing E20 has passed through in depth checking out and that there’s no proof of fashionable engine harm led to through the gas. Then again, issues over decreased mileage and compatibility amongst homeowners of older cars have persevered.
The problem has additionally reached the Best Court docket, which in 2025 disregarded a problem to the national E20 rollout.
Nageswaran and Poojari have additionally raised questions on expanding ethanol mixing past 20%. They argued that upper mixing goals may just require greater amounts of feedstock, elevating issues over agricultural land, water intake and the diversion of plants from meals and different makes use of in opposition to gas manufacturing.
The authors have referred to as for a better evaluation of the food-versus-fuel trade-off sooner than India commits to better ethanol-blending goals.
Nageswaran’s proposal successfully separates the continuation of India’s ethanol programme from the requirement that each one petrol cars use the similar mix. Underneath his recommendation, E20 may just stay to be had for suitable more moderen cars, whilst E10 may well be introduced to older cars throughout the transition till they’re upgraded, retrofitted or changed.
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