Ethanol blends around the world: the global success story

Published 27 July 2026 · Global perspective

India's switch to E20 can feel like a leap into the unknown — but ethanol-blended petrol is not new. Several countries have run it for decades, and their track record is largely a success story. Here is how the world's biggest programmes have fared.

Brazil — the global benchmark

Brazil is widely regarded as the gold standard. It has blended ethanol into petrol since the 1970s and now runs one of the highest mandates on earth: from August 2025 its standard petrol is E30 (30% ethanol), up from 27%. Around four-fifths of its cars are flex-fuel, able to run on any blend up to pure ethanol. Decades of gradual increases, clear pump labelling and stable policy made higher blends feel normal rather than risky.

United States — E10 everywhere, E15 rising

Almost all petrol sold in the US is E10, and higher blends are expanding: E15 (sold as "Unleaded 88") is increasingly available, and E85 serves the country's flex-fuel fleet. The programme is driven by the federal Renewable Fuel Standard, and government testing found modern vehicles handle intermediate blends without malfunction.

Europe — E10 as the new normal

Most European countries cap blends at E5 or E10, but E10 has quietly become the standard petrol in the UK, France, Germany and beyond. The transition there was smooth, with older-vehicle guidance published alongside the rollout — much like India's build-date approach.

Thailand and wider Asia

Thailand has sold ethanol "gasohol" for years and is focusing its roadmap on E20. The Philippines and others run E10 with E20 ambitions. Across more than twenty countries, E10-and-below blends are simply part of everyday driving.

What India can take from this

The global lesson is encouraging but clear: ethanol blending works, and it delivers on energy security and emissions — but the smoothest transitions were gradual, paired with flex-fuel vehicles, honest owner guidance, and steady rules. India has reached E20 unusually fast, so vehicle compatibility and public confidence are the parts to get right.