E20 Fuel May Affect Older Vehicle Parts
An ARAI-linked report has raised fresh concerns over the use of E20 petrol in vehicles originally designed for E10 fuel, particularly over rubber fuel-system components in older vehicles.
E20 Petrol Compatibility Concerns
The report said vehicles designed for E10 petrol may face durability concerns if they are operated on E20 fuel over a longer period. E20 petrol contains 20% ethanol and 80% petrol, while E10 contains 10% ethanol.
The main concern is linked to rubber components in the fuel system, including hoses, seals, gaskets and O-rings. Higher ethanol content can affect some older materials if they were not designed or tested for E20 compatibility.
Rubber Fuel Parts May Need Replacement
The findings suggest that certain rubber fuel-system parts in E10-compliant vehicles may require earlier replacement if the vehicles continue running on E20 petrol. However, the report does not indicate immediate or universal engine failure.
Testing also reportedly found no major compatibility issues in two-wheelers studied under the programme. For cars, concerns were more relevant to specific older or E10-calibrated models, especially where fuel-system material compatibility had not been upgraded.
India E20 Rollout Under Scrutiny
India has expanded the E20 petrol rollout as part of its ethanol blending programme to reduce crude oil imports, support domestic ethanol production and lower emissions. The government has maintained that the transition is backed by technical testing and that modern vehicles are designed to handle E20 fuel.
Automakers have also stated that newer vehicles are E20-compliant. However, vehicle owners and dealers continue to raise questions about mileage loss, maintenance costs and the lack of clear fuel-choice options for older vehicles.
The latest findings are likely to intensify calls for better consumer awareness, model-wise compatibility guidance and clearer servicing advice during the transition.
