Govt Clears 100% Flex Fuel Rules; Why Regular Cars Cannot Run On E100

The central government has amended motor vehicle regulations to establish a framework permitting flex-fuel vehicles to run on up to 100 percent ethanol, known as E100. However, conventional petrol vehicles cannot use E85 or E100 fuel, as higher ethanol blends require specialised engines, fuel systems, and sensors. The amendment also increases the weight threshold for light petrol and diesel vehicles from 3,000 kg to 3,500 kg. India is promoting ethanol blending to cut crude oil import dependency and create demand for agricultural produce like sugarcane and maize. Amid the transition, concerns remain among motorists regarding reduced mileage and potential engine wear in vehicles not calibrated for higher blends.