Popular Indian YouTuber Sourav Joshi has sparked a fresh debate over the impact of ethanol-blended petrol after claiming that it drastically reduced the fuel efficiency of his Mercedes-Benz. Sharing his experience on social media, Joshi wrote, "Ethanol-blended petrol destroyed my Mercedes mileage from 16-17 km/L down to 5 km/L. Scared to even tank up. Car will be finished soon." His remarks quickly went viral, drawing mixed reactions from automobile enthusiasts, industry experts, and fellow vehicle owners.
According to Joshi, his luxury car previously delivered an impressive mileage of around 16 to 17 km per litre. However, after using ethanol-blended petrol, he alleged that the fuel economy dropped dramatically to nearly 5 km per litre. He also expressed concern that continued use of the fuel could damage the vehicle's engine, saying he now feels hesitant to refuel the car.
The statement comes at a time when India is actively promoting ethanol blending as part of its strategy to reduce dependence on imported crude oil, lower carbon emissions, and support domestic sugarcane farmers. Petrol sold across most parts of the country now contains up to 20% ethanol (E20), and the government has encouraged automobile manufacturers to develop vehicles compatible with higher ethanol blends.
While Joshi's experience has resonated with some motorists who have reported changes in mileage after switching to E20 fuel, automotive experts caution against drawing broad conclusions from a single case. They point out that several factors can influence fuel efficiency, including driving style, traffic conditions, tyre pressure, vehicle maintenance, engine tuning, and the compatibility of a vehicle with ethanol-blended fuel.
Experts also note that ethanol contains less energy per litre than conventional petrol. As a result, vehicles may experience a small reduction in fuel economy, typically in the range of 3% to 8% when using E20 petrol. However, a drop from 16–17 km/L to 5 km/L would be considered highly unusual and could indicate an unrelated mechanical issue or a problem requiring professional inspection.
Automobile manufacturers have also been preparing for the transition to higher ethanol blends by introducing E20-compatible engines. Owners of older vehicles are generally advised to consult their vehicle manuals or authorized service centres to ensure compatibility before regularly using higher ethanol blends.
Joshi's comments have reignited discussions on social media, with some users supporting his concerns while others urged caution, arguing that individual experiences should not be treated as definitive evidence against ethanol-blended fuel. The debate has also highlighted the need for greater consumer awareness regarding fuel compatibility and vehicle maintenance.
As India continues its push toward cleaner and more sustainable transportation, balancing environmental goals with consumer confidence remains important. Sourav Joshi's viral post has once again brought the conversation into the spotlight, encouraging both motorists and policymakers to examine the real-world performance of ethanol-blended fuels and address concerns through transparent testing, education, and technical support for vehicle owners.
