Mercedes-Benz E20 Fuel Advisory: All BS VI Petrol Cars Are Compatible
Published: July 13, 2026 | Source: Mercedes-Benz India (Official)
Official Customer Advisory
"All Mercedes-Benz petrol BS VI vehicles are materially compatible with E20 fuel and certified accordingly by relevant authorities."
Mercedes-Benz India, July 12, 2026
What triggered this advisory
Mercedes-Benz India issued this customer advisory on July 12, 2026 shortly after Indian YouTuber Sourav Joshi (India's most-followed daily vlogger with over 30 million subscribers) posted a video claiming his Mercedes-Benz SUV's mileage dropped sharply due to E20 ethanol-blended petrol.
In the video, Joshi claimed:
- His Mercedes SUV mileage dropped from 17 kmpl to 5 kmpl within 48 hours
- A full tank driving range fell from approximately 800 km to 480 km
- He blamed ethanol in the fuel for the drop and expressed fear of engine damage
The video went viral, prompting concerns among Mercedes owners across India about E20 fuel safety. Mercedes-Benz India responded with the official advisory within hours.
Mercedes-Benz India's official statement
The full text of the customer advisory states:
"At Mercedes-Benz, customer safety, vehicle reliability and performance are of paramount importance to us.
All Mercedes-Benz petrol BS VI vehicles are materially compatible with E20 fuel and certified accordingly by relevant authorities.
We are happy to support customers for any technical queries. Mercedes-Benz remains committed to sustainable mobility."
Source: @MercedesBenzInd on X (Twitter)
What this means for Mercedes-Benz owners
E20 fuel is safe for your Mercedes
All BS VI petrol Mercedes vehicles are engineered and certified for E20 fuel. The fuel system, seals, gaskets, and ECU calibration support 20% ethanol blending.
Minor mileage drop is normal
A 2-4% mileage reduction with E20 is expected across all vehicles (per SIAM data) because ethanol has about 30% less energy per litre than petrol. This is not a defect.
Warranty covers E20 use
E20 fuel use in BS VI Mercedes vehicles is fully covered under the manufacturer's warranty. No risk of voided warranty for using standard E20 petrol from pumps.
Pre-BS6 models need caution
Older Mercedes vehicles manufactured before BS6 Phase 2 (pre-April 2023) were designed for E5 or E10 fuel. These may experience greater mileage drops (6-10%) and potential fuel system wear with E20.
Can E20 cause a 17 to 5 kmpl drop?
A drop from 17 kmpl to 5 kmpl represents a 70% reduction in fuel efficiency. According to multiple authoritative sources, this magnitude of drop is not attributable to E20 fuel alone:
Society of Indian Automobile Manufacturers reports 2-4% mileage drop for E20 compliant vehicles
Automotive Research Association of India found up to 6% mileage loss in testing, ruling out engine breakdowns from E20
National report estimates 6-10% drop for non-compliant vehicles. Even worst case is far from 70%.
A 70% mileage drop would indicate other issues such as a vehicle malfunction, sensor error, driving conditions, or a faulty fuel batch. Mercedes-Benz has offered to support customers with technical queries for such concerns.
Mercedes-Benz models that are E20 compatible
According to Mercedes-Benz India's advisory and BS6 Phase 2 norms, the following petrol models manufactured from April 2023 onwards are E20 compatible:
What is E20 fuel?
E20 is petrol blended with 20% ethanol and 80% gasoline. India mandated E20 at all fuel pumps from April 1, 2026 with a minimum RON of 95. The ethanol blending programme aims to reduce crude oil imports, support farmers, and lower carbon emissions.
All vehicles manufactured from April 2023 onwards under BS6 Phase 2 norms are required to be E20 compatible. This applies to all brands including Mercedes-Benz, BMW, Audi, and domestic manufacturers.
Government's response to E20 mileage concerns
The Indian government has defended the ethanol blending programme, stating it has helped the sugar economy, boosted farmers' incomes, and saved over Rs 1.90 lakh crore in foreign exchange since 2014-15. The government maintains that E20 is safe for all BS6 Phase 2 certified vehicles.
However, consumer surveys show real-world concerns. A LocalCircles survey (June 2026) found that 66% of pre-2023 vehicle owners report over 10% mileage loss. The government has paused the E25 transition amid this backlash.
Check your Mercedes-Benz E20 status.
Find your exact model and year to see detailed E20 compatibility, variant-wise breakdown, and mileage impact estimates.
Mercedes-Benz E20 Advisory FAQ
Is Mercedes-Benz E20 compatible in India?
Yes. Mercedes-Benz India officially confirmed that all its petrol BS VI vehicles are materially compatible with E20 fuel and certified by relevant authorities. This includes models like GLC, GLE, C-Class, E-Class, S-Class, and others manufactured under BS6 norms.
Why did Mercedes-Benz issue an E20 advisory?
Mercedes-Benz India issued the customer advisory on July 12, 2025 after popular vlogger Sourav Joshi claimed his Mercedes SUV mileage dropped from 17 to 5 kmpl due to E20 petrol. The advisory clarified that all Mercedes BS VI petrol vehicles are E20 compatible.
Does E20 fuel damage Mercedes-Benz engines?
No. According to Mercedes-Benz India, all BS VI petrol vehicles are designed and certified for E20 fuel. The fuel system components, seals, and ECU are calibrated to handle 20% ethanol blending without damage.
Will E20 reduce mileage in Mercedes-Benz cars?
A minor mileage drop of 2-4% is expected with E20 fuel in any vehicle due to ethanol having lower energy density than petrol. This is normal and not a sign of incompatibility or damage. SIAM data confirms this range for BS VI compliant vehicles.
What did Sourav Joshi claim about E20 and his Mercedes?
YouTuber Sourav Joshi claimed his Mercedes SUV mileage dropped from 17 kmpl to 5 kmpl within 48 hours and blamed ethanol-blended fuel. He also said his driving range fell from 800 km to 480 km per full tank. Mercedes-Benz responded with an official advisory confirming E20 compatibility.
Which Mercedes-Benz models are E20 compliant?
All Mercedes-Benz petrol models manufactured under BS VI norms (from April 2023 onwards under BS6 Phase 2) are E20 compliant. This includes the C-Class, E-Class, S-Class, GLC, GLE, GLS, A-Class, GLA, GLB, and AMG models. Older pre-BS6 models may not be fully compatible.
Is the Mercedes-Benz GLE E20 compatible?
Yes. The Mercedes-Benz GLE manufactured from 2023 onwards under BS6 Phase 2 norms is E20 compatible. Older GLE variants (pre-2023) were designed for E10 fuel and may experience higher mileage drops with E20.
What is the official source of Mercedes-Benz E20 advisory?
Mercedes-Benz India shared the customer advisory on their official X (Twitter) account @MercedesBenzInd on July 12, 2026. The statement confirmed material compatibility of all BS VI petrol vehicles with E20 fuel.