Surendra Babu
•1dWill using E20 blended petrol cause any damage to the engine of a pre-2023 model SUV?

Autocar India
Cars made before April 2023 were generally designed for lower ethanol blends, so while they will run on E20 without any immediate issues, they are not optimised for it. In real-world testing, older petrol cars have shown a noticeable drop in fuel efficiency of around 8-12 per cent, simply because ethanol has lower energy content.
From a durability perspective, there is no evidence of sudden engine damage or failures. Industry testing and government-backed studies have shown that even older vehicles can run on E20 without abnormal wear or performance issues in the short to medium term.
However, over the long term, there can be minor effects. Ethanol can be slightly more corrosive, so components like rubber seals, hoses or fuel system parts may wear a bit faster in some older cars. These are typically small, inexpensive replacements and not major engine issues.
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Posted on: 3 May 2026
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