Only 95 RON E20 fuel will be available from April 1 2026

The government has announced that starting April 1, 2026, all petrol sold across India must be E20 grade with a minimum octane rating of 95, according to a report by The Economic Times.

 This means fuel pumps across every state and Union Territory will dispense petrol blended with 20 percent ethanol, and it must meet at least 95 RON to ensure engine performance and efficiency. 

The move is part of India’s broader push to accelerate ethanol adoption, reduce dependence on crude oil imports, and cut tailpipe emissions. A higher octane rating is intended to safeguard engines against knocking while maintaining smoother combustion, particularly in newer vehicles that are already calibrated for E20 compatibility.

“The central government hereby directs that oil companies shall sell ethanol-blended motor spirit (petrol) with percentage of ethanol up to 20% as per the Bureau of Indian Standards specifications and having a minimum Research Octane Number (RON) of 95 in states and the Union Territories.” -Ministry of Petroleum and Natural Gas of India

 Over the past few years, carmakers have been updating engines and fuel systems to handle higher ethanol blends, with most recent petrol models designed to run on E20 without mechanical changes. However, older vehicles may experience marginal differences in fuel efficiency or component wear if not specifically tuned for higher ethanol content. 

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The mandate is also expected to benefit the agricultural sector, as ethanol production primarily relies on sugarcane and grain-based feedstock, creating stronger demand and supporting farmer incomes.

How will this mandate affect Pre E20 Cars?

For cars and bikes made before 2023, running on E20 petrol can have mixed outcomes. Older vehicles were not originally designed for a 20 % ethanol blend, so they might show a slight drop in fuel efficiency (typically around 3 – 7 %) and some owners report faster wear of rubber and plastic fuel system parts like seals, hoses and gaskets which to make matters worse might not covered in insurance.

Higher ethanol content can also attract moisture and could, over time, lead to corrosion or premature ageing of components in non-E20-ready vehicles. Industry sources say major engine damage isn’t common and warranties are generally honoured, but real-world experiences vary. Owners of classic bikes and older cars sometimes need ethanol-resistant replacement parts or retrofit options to improve long-term reliability

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