Expert Warnings on Mileage Drop
Several automotive experts, speaking to PTI, have indicated that switching to 20% ethanol-blended petrol (E20) could decrease fuel efficiency by approximately 2–5%, depending on vehicle type. The reduction stems from ethanol’s lower calorific value compared to pure petrol—fueling concerns especially among owners of older, non–E20-compliant vehicles, which may also experience long-term erosion of fuel system components like gaskets and rubber hoses—not immediately, but over time.
Government’s Position & Clarifications
In response, the Ministry of Petroleum and Natural Gas emphasized that reports of a “drastic” fuel economy drop are misleading. They noted vehicles originally designed for E10 fuel and recalibrated for E20 may see only a 1–2% reduction in fuel efficiency. For other vehicles, the drop may reach 3–6%, but this can be significantly mitigated with proper engine tuning and E20-compatible components—many already in use since April 2023.
Moreover, the ministry highlighted performance benefits: better acceleration (important in urban driving), improved volumetric efficiency due to ethanol’s higher heat of vaporization, and reduced intake temperatures.
3. Automakers’ Stance
Tata Motors confirmed that its vehicles are E20-compliant, aligning with government timelines and industry readiness.
Why This Matters
| Factor | Insight |
|---|---|
| Energy Transition | E20 rollout supports India’s goals to reduce emissions and boost rural incomes through ethanol use. |
| Consumer Awareness | Highlighting vehicle compatibility and realistic performance expectations is vital, especially for older car models. |
| Mitigation Strategies | The impact on fuel economy is manageable when vehicles are properly tuned and upgraded for E20 use. |
| Balanced Messaging | Government communications attempt to dispel panic, while experts offer pragmatic caution—helping ensure smoother consumer adaptation. |
Related Coverage Highlights
- Ministry clarifies E20’s marginal effect, counters “fear-mongering” over performance and safety.
- Despite early gains, vehicle owners continue voicing concerns about mileage drop and adaptation costs.