Government Clarifies 2% to 6% Mileage Drop in Non-E20 Vehicles

The Union Ministry of Petroleum and Natural Gas informed Parliament that using E20 fuel—petrol blended with 20% ethanol—leads to an estimated fuel efficiency drop of only 2% to 6% in older, non-E20 compliant vehicles. The official statement formally rejected social media claims alleging severe mileage loss and rapid engine degradation due to higher ethanol concentration.

India launched the National Policy on Biofuels in 2018, subsequently advancing its target for 20% ethanol blending in petrol (E20) from 2030 to 2025-26. Blending domestically produced ethanol with petrol reduces crude oil import dependence, curtails carbon monoxide and tailpipe emissions, and boosts farm incomes by utilizing sugarcane juice, damaged food grains, and maize as feedstocks.

According to official technical assessments conducted by automotive research bodies, material compatibility concerns in legacy vehicles are minimal, while engine recalibration in newer vehicles completely neutralises efficiency losses. India’s national average ethanol blending ratio surpassed 15% by mid-2026, delivering substantial foreign exchange savings amounting to thousands of crores.

The clarification alleviates consumer concerns while keeping India firm on its net-zero emissions path and energy self-reliance targets. For aspirants, Prelims questions frequently target ethanol generation generations (1G to 4G), National Biofuel Policy targets, and energy blending mechanics, whereas Mains questions focus on agricultural diversification and energy security.