BS-III vehicle rubber parts may require replacement when operated with E20 fuel: Centre
The Indian government has clarified that while E20 fuel is generally safe for most vehicles, older BS-III vehicles manufactured before 2016 may require the replacement of specific rubber parts and gaskets. Officials emphasized that engine modifications are not necessary and performance remains stable.
Why it matters
This provides critical maintenance guidance for millions of vehicle owners in India transitioning to higher ethanol-blend fuels.
The government on Wednesday (July 29, 2026) said some rubber parts and gaskets in BS-III vehicles, introduced from April 1, 2005, and manufactured before 2016, may need to be replaced when operated with E20 fuel (petrol containing 20% ethanol).
In a written reply to the Rajya Sabha, Road Transport and Highways Minister Nitin Gadkari said that with regard to the concern of vehicle mileage due to the use of E20 fuel, automobile manufacturers and vehicle/engine testing agencies have clarified that vehicle mileage is influenced by a host of factors beyond just fuel type.
Mr. Gadkari said a study for the evaluation of effects of E20 on two-wheelers and four-wheelers was carried out jointly by Indian Oil Corporation Limited (IOCL), Indian Institute of Petroleum (IIP) Dehradun, Society of Indian Automobile Manufacturers (SIAM) and Automotive Research Association of India (ARAI).
Get smarter about the news
Sign up free for a feed built around what you actually care about, Dive Deeper research on any story, and the full text of every article.
Create free accountAlready have an account? Sign in