E20 petrol may affect turbocharged engines, damage rubber fuel-system parts in E10 vehicles; no issues found in two-wheelers: ARAI report

India has completed its nationwide E20 petrol rollout, which raises concerns for older vehicles. ARAI tests showed mixed results for four-wheeler engines using E20 fuel. Two-wheeler durability tests indicated acceptable performance with E20 fuel. Automakers state E20 is safe for existing vehicles after extensive testing. Higher ethanol blends like E25 could present greater challenges for the automotive industry.

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