Government updates vehicle rules to clear path for pure ethanol fuel

The Ministry of Road Transport and Highways has amended the Central Motor Vehicles Rules to permit flex-fuel vehicles that can run on up to E100, which is nearly pure ethanol.

Rules And Weight Limits

The final notification was issued on October 23 and published in the official gazette on October 26 after the ministry reviewed public feedback on draft rules from April 27. The government updated vehicle classification thresholds, fuel specifications, and technical references in emission-related testing provisions. Officials also raised the vehicle weight limit to 3,500 kg from the previous 3,000 kg for light petrol and diesel vehicles affected by these changes.

Fuel Restrictions

Fuel beyond E20 and up to E100 applies only to vehicles specifically designed and certified to use it. Ordinary vehicles running on E20 or normal petrol cannot use E85 or E100 fuel. Transitioning to these high-ethanol blends requires upgraded fuel system components like seals, fuel lines, and injectors to handle ethanol's corrosive properties, along with a retuned engine management system.

Industry Impact

Major automakers including Maruti Suzuki India, Toyota Motor Corporation, Tata Motors, and Hyundai Motor Company are developing flex-fuel vehicles for the Indian market. Maruti Suzuki launched India's first flex-fuel passenger vehicle, the Wagon R Flex Fuel, in June. Brazil currently runs the world's most mature flex-fuel programme using sugarcane-derived ethanol since 2003.

Context

Promoting high-ethanol fuels helps reduce dependence on imported crude oil, which contributes heavily to the national current account deficit. This shift gains extra importance during global energy crises driven by conflicts in regions like West Asia.