The Bureau of Indian Standards has officially notified technical specifications for E22, E25, E27 and E30 petrol blends under a new standard effective from 15 May 2026.
The notification signals India's regulatory intent to push ethanol blending well beyond the current E20 programme, even as vehicle compatibility and infrastructure challenges remain.
New Standards Formalise the Road Beyond E20
Having already made E20 fuel mandatory across the country, the Indian government has now formalised the next leg of its ethanol blending ambitions. The Bureau of Indian Standards (BIS) has published a notification in the Gazette of India, introducing a new standard, IS 19850:2026, which lays down technical and quality specifications for four higher ethanol blends: E22, E25, E27 and E30.
The standard came into effect on May 15, 2026 and was issued under Rule 15(1) of the Bureau of Indian Standards Rules, 2018.
The specifications cover permissible levels of anhydrous (water-free) ethanol in the fuel mixture, octane ratings, sulphur content and vapour pressure. They also define blending requirements, acceptable impurity levels, testing methods and safety norms for each blend. These are not merely technical footnotes; they represent the formal quality framework that will govern how these fuels are produced, verified, and distributed across the country in the years ahead.
Why India Wants More Ethanol in Its Petrol
The timing of this notification is no coincidence. India has been grappling with rising fuel prices linked to ongoing geopolitical tensions in West Asia, and reducing dependence on imported crude oil has become an increasingly urgent policy priority.
Domestic ethanol production capacity has also been growing, with industry bodies noting a surplus that needs a larger market to absorb. Boosting the permissible ethanol content in petrol addresses both concerns at once, and the sugar and biofuel industries have been vocal advocates for precisely this kind of regulatory progress.
It is worth noting that the new BIS notification does not mandate an immediate nationwide rollout of E30 fuel. Rather, it establishes the technical groundwork that automakers, fuel companies and distribution networks need to begin planning for higher-blend compatibility well in advance.
Automakers Have Work Ahead of Them
Engineering Demands of Higher Ethanol Blends
While most new vehicles sold in India today have been engineered to run on E20 fuel, moving to blends such as E30, E85 or E100 is a significantly more involved undertaking.
Higher ethanol concentrations require additional engineering work around engine calibration, fuel-system durability, corrosion resistance and material compatibility. These are not insurmountable challenges, but they do demand time, investment and thorough validation.
Several manufacturers have already been exploring this space. Flex-fuel compatible vehicles have been showcased by various makers in India, and a number of two-wheeler prototypes and concepts running on E85 or E100 have been presented at industry events. The direction of travel is clear, even if the pace of adoption remains subject to infrastructure readiness.
The Challenge of Fuel Consistency and Infrastructure
Industry stakeholders have consistently pointed to the need for greater alignment across fuel infrastructure and dispensing systems before higher-blend fuels can realistically be rolled out at scale.
Ethanol also carries a lower energy density than petrol, which means vehicles may consume slightly more fuel to deliver the same performance and range, a factor that older, non-optimised engines will feel more acutely than newer ones designed with higher blends in mind.
A Broader Shift in Fuel Policy
The BIS notification on E22 to E30 fuel standards arrives alongside a separate government proposal to recognise E85 and E100 fuels under the Central Motor Vehicles Rules, a broader signal of where India's fuel policy is headed.
In addition to the new petrol blend standards, BIS has also notified revised specifications for dimethyl ether (DME) blended LPG and other industrial standards as part of the same regulatory exercise.
For automakers, suppliers and fuel companies, the practical significance of this notification lies in the early regulatory direction it provides. Building compatible vehicles and distribution infrastructure takes years, and knowing the standards ahead of time is exactly the kind of forward guidance that the industry needs to invest with confidence.
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