You pull up at your regular petrol pump and notice something new. A small sticker near the nozzle. A line on the receipt you haven't seen before. The attendant mentions, almost casually, that this is E20 now.

For most drivers, E20 is simply what comes out of the nozzle today. It's worth understanding exactly what changed, and what it means for the vehicle in your driveway.

E20 is petrol blended with up to 20 percent ethanol, an alcohol made from crops such as sugarcane and maize, mixed with 80 percent regular petrol. Since 1 April 2026, it has been the standard petrol grade at pumps across the country, meeting a minimum Research Octane Number (RON) of 95 under Bureau of Indian Standards norms. One in every five litres in your tank is now plant-based rather than crude-oil-based.

The blend before this was E10, with 10 percent ethanol. India moved from about 1.5 percent ethanol blending in 2014 to 20 percent in 2025, reaching the target five years ahead of the original 2030 deadline.

India isn't the first to do this

Ethanol blending is neither new nor uniquely Indian. Brazil has run blends of roughly 20 to 27 percent since the late 1970s, built over five decades around sugarcane and flex-fuel cars, and now targets 30 percent. Paraguay mandates around 30 percent, also drawing on domestic sugarcane.

The United States offers drivers a choice between E10, E15 and higher blends rather than a single mandate. Thailand offers E20 as well, though take-up there has been slower, with some drivers choosing lower blends over engine-damage concerns despite E20 being cheaper.

What sets India apart is less the blend level, since several countries go higher, than the pace. The shift that took Brazil close to fifty years, India made in about a decade. The global experience offers a useful........

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