The price stayed the same. The math didn't.

The government advertises roughly ₹1.4–1.55 lakh crore in forex savings from ethanol blending. None of that has been passed back to consumers as a lower pump price. In October 2022, an additional ₹2/litre excise duty was placed on unblended fuel — a penalty on the alternative, not a discount on E20. In June 2026, excise duty was waived entirely on higher blends (E22–E30) — but that waiver targeted refiners, and regular pump prices in major cities didn’t move on the day it took effect Prism News.

Here’s the mechanism that makes this worse than it first looks: petrol sits outside GST. Instead it’s taxed through a fixed central excise duty plus an ad valorem state VAT — typically 25–35% of the price, not a flat rupee amount. Independent analyses put combined taxes at roughly 50–55% of the pump price PRS India. Because that tax is a percentage, every extra litre a mileage loss forces you to buy carries its own proportional tax on top — the mileage loss and the tax burden compound each other.

E20 is sold at the exact same price as conventional petrol — roughly ₹101–115 per litre depending on the state. Yet the government confirms ethanol costs ₹71.32/litre to procure, which is higher than the base petrol it replaces. There is no price pass-through to consumers for the lower energy content.

Petrol is outside India’s GST framework. It is taxed through cascading central excise (₹21.90/litre) and state VAT (~19.4%), together constituting ~50% of the retail price. When E20 damages your vehicle, you pay for repairs plus 18% GST on parts and labor. The government collects tax on the fuel, then collects tax again when you fix the damage it caused.

A major Indian insurer announced that engine damage from using E20 in non-compatible vehicles would not be covered by insurance. This means the entire repair cost falls on the vehicle owner with no recourse.