E20 petrol: what it means for your car, bike or scooter

What is E20 petrol?

E20 is petrol blended with 20% ethanol, made in India from sugarcane, maize and surplus grain. Blending rose from under 1.5% in 2013-14 to 20% in 2025-26, and E20 is now the standard petrol across the country's pumps. The government's reasons are fewer crude oil imports, income for farmers and lower emissions.

You can't choose between pure petrol, E10 and E20 at the pump: the government says stocking three separate base fuels at more than a lakh outlets isn't practical. So the useful question isn't whether to use E20, but whether your vehicle is ready for it and what to watch.

Is my car or bike E20 compatible?

1. Look for the label. E20-ready vehicles carry an “E20” sticker on the fuel lid (cars) or near the tank cap (two-wheelers). Older lids may say E10 or E5 even on some vehicles the maker now calls compatible, so don't stop there.
2. Check the owner's manual. The fuel section says which blends the vehicle was certified for.
3. Check what your maker says. Most makers say vehicles built from around April 2023 (BS6 Phase 2) are E20-compliant, and several say older models are material-compatible too:

Maker	What they have said
Hero MotoCorp	E20-compliant vehicles from April 2023; for older BS-III/BS-IV models, “marginal impact on fuel efficiency”
Honda two-wheelers	Older models are “material-compatible with E20”, with no impact on engine part life
Bajaj	Reported as material-compliant back to BS4 (2017) models
TVS	Reported as E20 material-compliant since 2023
Royal Enfield	Reported as E20-compliant since BS6 (2020)
Volkswagen	Components of BS6 petrol cars sold after 1 April 2020 are E20 compatible, even if the fuel-lid sticker says E5 or E10

“Reported” = from the makers' statements as carried by motoring media; the rest are the makers' own words. Owner's manuals we've read for our service schedules list E20 for the Maruti Dzire, Royal Enfield Bullet 350 and Honda Shine 125. For any other model, ask your maker's service centre with your registration or VIN.

My manual says E10 — is E20 unsafe?

The government's answer (FAQ, 10 July 2026) is no: a manual reflects the fuel standard that existed when the vehicle was certified, and E20 was tested by ARAI, SIAM, oil companies and makers — including on older vehicles — before it reached pumps. Its strongest evidence is service data: Maruti Suzuki serviced 2.84 crore cars in FY 2025-26, about 1.5 crore of them older vehicles never certified for E20, and found no E20-related damage. Hero MotoCorp reported the same from its service data.

Some mechanics and owners have worried about rubber hoses, seals and gaskets in older vehicles over the long term. That's worth keeping an eye on rather than acting on: if you notice a petrol smell, a wet fuel line or harder starting on an old vehicle, have the fuel lines checked at your next service.

How much mileage does E20 cost?

The viral “30 percent less mileage” comes from ethanol's lower energy content compared to petrol — but only a fifth of E20 is ethanol, and the government says that figure doesn't describe real-world mileage. Its FAQ says some vehicles may see a 3 to 5 percent drop. Maruti Suzuki's example: a car giving 20 km/l loses about 0.6 km/l.

Mileage before	3% less	5% less
15 km/l (car)	14.6 km/l	14.3 km/l
20 km/l (car)	19.4 km/l	19.0 km/l
45 km/l (scooter)	43.7 km/l	42.8 km/l
60 km/l (bike)	58.2 km/l	57.0 km/l

Driving style, tyre pressure, servicing and AC use change mileage more than this. The only way to know what E20 did to your vehicle is to measure it over a few fills: fill up, note the km, and at the next fill divide the km driven by the litres — the mileage calculator does the sum, and the fuel cost calculator turns it into ₹ per km.

Insurance and warranty

• Insurance: PIB Fact Check called the claim that E20 leads to rejected insurance claims fake (16 June 2026): “Motor insurance policies remain valid with the use of E20 fuel.” ICICI Lombard said claims aren't rejected just because a vehicle ran on E20.
• Warranty: SIAM, the makers' body, has said warranties will be honoured for vehicles running spec-compliant E20 — for older vehicles too, whatever the manual says.

Fuel quality

Ethanol mixes with water more readily than petrol, so keeping water out of the tank matters — modern vehicles are designed for it, and a tightly closed fuel cap does the rest. In mid-2026 the makers' body SIAM raised concerns about chloride in some fuel, then withdrew its letter, saying the numbers needed checking; the oil ministry said its testing found chloride at only two outlets, and sales there were stopped. If a vehicle runs badly straight after a fill, keep the bill and tell the pump's oil company.

E85 and what comes next

E85 is not for regular vehicles. It went on sale on 5 June 2026 at 48 pumps for flex-fuel vehicles only. Never fill it in a normal petrol car or bike. Higher everyday blends are being prepared — the Bureau of Indian Standards published standards for E22 to E30 in May 2026 — but no date has been announced for them at pumps.

What to do as an owner

1. Check your vehicle's label, manual or maker's statement once.
2. Measure your mileage over two or three fills instead of going by what others say.
3. Keep to the service schedule in your manual — nothing changes for E20.
4. On an older vehicle, ask the mechanic to look at the fuel hoses at the next service.
5. Never fill E85 unless the vehicle is flex-fuel.

Sources

• Ministry of Petroleum & Natural Gas / PIB: Ethanol Blended Petrol Programme — Frequently Asked Questions (10 July 2026) and Ethanol Blending in India (5 July 2026)
• PIB Fact Check on E20 and motor insurance, 16 June 2026
• Maker statements as reported by Autocar India (September 2025); Volkswagen India's E20 page