Somewhere between your next fuel refill and the government’s dream of E100, a fascinating story is unfolding. The plot involves sugarcane, oil imports, climate goals, confused car buyers and a fuel pump that increasingly feels like a chemistry lab.
Your car wanted petrol. The government gave it a cocktail.
Imagine walking into your favourite cafe and ordering a strong black coffee. The barista smiles and says, “Great choice. We’ve mixed it with something healthier, greener and locally sourced.”
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You take a sip. It’s still coffee. But somehow, you need another cup sooner than usual. Welcome to the world of ethanol-blended fuel. One of the least discussed realities of ethanol is that it contains less energy than petrol. In simple terms, your engine needs to drink a little more of it to travel the same distance. It’s a bit like replacing full-fat milk with skimmed milk and wondering why you’re hungry again by lunchtime.
The vehicle still runs. The destination doesn’t change. But the fuel gauge seems slightly more enthusiastic about moving downward. And now that India is moving from E20 towards even higher blends such as E30, E85 and eventually E100, many vehicle owners are beginning to ask a simple question: Why are we doing this in the first place?
What exactly is ethanol?
Ethanol is produced mainly from sugarcane, corn and other agricultural feedstocks. Instead of ending up in beverages, it is processed and blended with petrol to power vehicles.
The “E” in E20 simply refers to ethanol.
- E5 = 5% ethanol, 95% petrol
- E10 = 10% ethanol, 90% petrol
- E20 = 20% ethanol, 80% petrol
- E30 = 30% ethanol, 70% petrol
- E85 = 85% ethanol, 15% petrol
- E100 = Pure ethanol
India spent years gradually increasing the ethanol content in petrol. E20 has already become available everywhere. But things became more interesting recently when Delhi got its first commercial E85 fuel dispensing station.
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E85? Are we skipping a few chapters here?
A little. The public conversation feels strange because many Indians are only now getting used to E20 while policymakers are already discussing E85 and even E100. Not every vehicle can use E85.
E85 is generally meant for specially designed flex-fuel vehicles. These vehicles can run on varying mixtures of petrol and ethanol without damaging the engine. Your average petrol car is not automatically ready for E85. So while E85 makes headlines, it does not mean everyone will suddenly be required to use it tomorrow.
At least not yet.
Why is India so obsessed with ethanol?
India imports a huge amount of crude oil. Every time global oil prices rise, India’s import bill feels the pain. Now imagine if a portion of that fuel could be produced domestically. That’s the government’s dream. Ethanol offers several advantages:
1. Less dependence on imported oil
Every litre of ethanol blended into petrol means slightly less imported crude oil. For a country that imports most of its oil, that’s a strategic advantage.
2. A new market for farmers
Sugarcane farmers often face surplus production. Ethanol creates an additional buyer for agricultural produce. Instead of excess sugar piling up, some of it can be converted into fuel.
3. Lower emissions
Ethanol generally burns cleaner than conventional petrol and can help reduce certain emissions.
4. Energy security
It essentially means not being overly dependent on someone else’s resources. The less India depends on imported fuel, the more control it has over its own energy future. From the government’s perspective, ethanol is not just fuel. It’s economic policy, agricultural policy and energy policy rolled into one.
Then why are people angry?
Because consumers don’t buy fuel policies. They buy fuel. They should care about mileage, cost and vehicle compatibility.
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Many motorists feel they were sold the environmental benefits without a sufficiently detailed discussion of the trade-offs. The most common complaint is reduced fuel efficiency. If a vehicle delivers slightly lower mileage on higher ethanol blends, drivers may end up visiting fuel stations more frequently.
Then there are concerns about older vehicles, long-term engine durability and maintenance costs. For many people, the calculation is simple, “If I’m filling up more often, am I really saving anything?” That’s a fair question. And it’s precisely why the public debate has become so heated.
Is the government preparing for E100 already?
Yes. The groundwork is being laid. The government has also expanded tax support by exempting petrol blended with higher ethanol levels from excise duty beyond E20.
What about diesel?
While petrol gets ethanol, diesel may eventually get help from another alcohol called isobutanol. This has attracted attention because it can blend more effectively with diesel than ethanol can. For now, diesel users don’t face the same immediate transition that petrol users are experiencing.
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Are we solving one problem while creating another?
Supporters see ethanol as a path toward cleaner, more self-reliant mobility. But critics point to concerns such as water-intensive sugarcane cultivation, pressure on agricultural resources, questions about real-world fuel efficiency and potential costs for consumers. The truth is, no magical fuel is waiting around the corner that solves all of these issues. It has always been a compromise.
Should you rethink your next petrol vehicle purchase?
Maybe hold onto the thought of buying your dream petrol car for now. If you are still hell bent on getting one, get an EV.
The bigger question nobody is asking
Perhaps the most interesting question isn’t whether ethanol is good or bad. It’s why we expect fuels to stay the same forever. For more than a century, we poured petrol into vehicles without thinking much about where it came from. Now governments, automakers and consumers are all debating what should power mobility next. Now every trip to the fuel station is becoming a small lesson in chemistry, economics, agriculture and national policy. Not bad for something that used to be just petrol.
Indrani Priyadarshini is a journalist and editorial professional specialising in technology, artificial intelligence, smart cities, green energy, and digital transformation. With over four years of experience in tech journalism and digital media, she is known for turning complex industry developments into clear, engaging, and insightful stories. Her expertise spans reporting, editorial strategy, digital publishing workflows, and in-depth coverage of emerging technologies shaping the future. She has also conducted high-profile interviews and podcasts with industry leaders, bringing sharp analysis and accessible storytelling to a wide audience.
