What is E20 petrol and when is it widely available in India?

E20 petrol is a blend of 20% ethanol and 80% gasoline. The Indian government aims for a full rollout across the country by 2025, so by July 2026, it is widely available at fuel stations.

Do older BS-III cars need modifications to run on E20 petrol?

As per Nitin Gadkari's statements to Parliament, some BS-III vehicles (manufactured before 2016) might require replacement of certain rubber parts and gaskets to ensure compatibility with E20. However, studies by IOCL, IIP Dehradun, SIAM, and ARAI found no engine modification is broadly needed for most legacy vehicles.

Will E20 petrol affect my car's performance or mileage?

Studies indicate no major performance issues or abnormal wear for most legacy vehicles when running on E20. Mileage can slightly vary depending on driving habits and vehicle maintenance, similar to regular petrol.

What is the Maruti Suzuki Wagon R Bioflex?

The Maruti Suzuki Wagon R Bioflex, launched in June 2026, is India's first production flex-fuel car. It can run on E20 up to higher ethanol blends (homologated E85), featuring updated fuel system components, an ethanol sensor, and a 1.2L petrol engine.

Are all new cars in India E20-ready?

Most new cars, especially BS-VI compliant vehicles, are designed to run on E20 petrol without issues and still meet emission norms. Many manufacturers are also actively launching E20-ready or flex-fuel models, like the Wagon R Bioflex, in India.

Is there a difference in cost for E20 petrol compared to regular petrol?

Historically, ethanol blends have been priced competitively, often slightly lower than pure petrol, due to government incentives and the lower cost of ethanol. Specific pricing can vary by state and market conditions in July 2026.

Where can I find more information about E20 compatibility for my specific car model?

It is recommended to consult your car manufacturer's official guidelines or visit their authorized service centers for specific details regarding E20 compatibility and any recommended checks for your particular model in India.