How to Check What Petrol Your Pump Actually Sells

India has no easily accessible, real-time database telling you exactly what blend of petrol a specific pump dispenses. Labelling is inconsistent, enforcement is weak, and the information gap between what OMCs know and what consumers see is enormous. Here’s how to figure out what’s actually going into your tank — and why it should not be this hard.

What the rules say about labelling

The Bureau of Indian Standards (BIS) specification IS 2796:2017 (Amd. 6) defines E20 petrol. This standard specifies motor spirit (petrol) containing up to 20% ethanol by volume. It covers parameters including octane number, vapour pressure, density, and ethanol content limits. The standard was amended specifically to accommodate higher ethanol blends as India moved from E5 to E10 and then E20. Under the Legal Metrology Act 2009 and its associated rules, fuel dispensers are supposed to display the product name, grade, and relevant quality markings. In practice, many pumps label dispensers as “Petrol” or “MS” (Motor Spirit) without specifying the ethanol percentage.

The term “MS” itself is a legacy designation. Motor Spirit is the formal commercial name for petrol in India, inherited from pre-independence petroleum regulation. On your fuel receipt, the abbreviation “MS” simply means petrol — it does not distinguish between E0, E10, or E20. Some receipts may show “E20 MS” or “MS E20”, but this is not standardised. The receipt format is determined by each OMC’s software system, and there is no regulatory requirement to print the ethanol percentage on the customer receipt.

The Petroleum and Natural Gas Regulatory Board (PNGRB) has issued guidelines requiring pumps to display the ethanol blend ratio. The PNGRB, established under the PNGRB Act 2006, is the downstream regulator for petroleum products. Its Technical Standards and Specifications for Marketing of Petrol and Diesel require retail outlets to display product specifications. However, compliance is uneven. Some pumps have updated stickers; many have not. The PNGRB conducts inspections, but with over 80,000 fuel stations in India and a limited inspection workforce, routine enforcement is thin. Penalties for non-compliance with display requirements exist on paper, but documented cases of action against pumps specifically for missing ethanol-blend labels are difficult to find in public records.

How fuel reaches the pump: the blending and delivery chain

To understand why pump-level information is unreliable, it helps to understand how E20 reaches the dispenser. The blending does not happen at the pump. It happens upstream, at OMC depots and terminals.

The process works roughly as follows:

1. Ethanol procurement: OMCs purchase ethanol from distilleries under contracts administered through a tender process. The ethanol arrives at OMC depots by tanker.
2. Depot-level blending: At the oil depot or terminal, base petrol (imported or refined domestically) is blended with ethanol in precise ratios using automated blending systems. The depot’s quality control lab tests each batch to confirm it meets IS 2796 specifications before dispatch.
3. Tanker dispatch: The blended E20 fuel is loaded into road tankers (typically 12,000–16,000 litre capacity) for delivery to retail outlets. Each tanker carries a delivery challan specifying the product, quantity, and batch details.
4. Pump delivery: At the fuel station, the tanker unloads into underground storage tanks. The pump dealer receives a copy of the delivery challan. The fuel is then sold from the underground tank through the dispensers.

The key point: the pump dealer does not blend fuel. The dealer sells what the tanker delivers. The blend ratio is determined at the depot. This means the pump attendant genuinely may not know the exact ethanol percentage — they know the product name on the delivery challan, not the lab test results.

It also means that during transition periods, a pump’s underground tank might contain a mixture of the old batch (say, E10) and the new delivery (E20), resulting in an intermediate blend that does not match any standard label. This commingling is acknowledged in industry practice, but is never communicated to the consumer.

Method 1: Read the dispenser

The simplest check. Look at the dispenser nozzle and display panel for:

• E20 or E20 Petrol labelling
• A sticker showing “Contains up to 20% Ethanol”
• The BIS mark with IS 2796 reference
• Any colour-coded nozzle or handle (some OMCs have adopted green for E20, but this is not universal)

If none of these are visible, it does not mean the fuel is pure petrol. Since April 2026, E20 is the standard blend supplied to all regular dispensers nationwide. The absence of a label usually means the pump hasn’t updated its signage, not that it’s selling E0.

Method 2: Ask the pump attendant

Pump attendants can usually tell you what they’re dispensing, but their knowledge varies. Useful questions:

• “Is this E20 or E10?” — Most will confirm E20 since that’s the standard supply now.
• “When did you switch to E20?” — Gives you a timeline.
• “Do you sell any non-blended petrol?” — The answer will almost always be no.
• “Can I see the last delivery challan?” — The dealer is required to maintain delivery records. The challan will show the product name and sometimes the BIS specification.

Be aware that attendants may not know the exact blend ratio. They sell what the tanker delivers. The blend is determined upstream by the oil marketing company (OMC). Some pump dealers are more forthcoming than others; a polite, specific question tends to get a more useful response than a general one.

Method 3: Check OMC websites and apps

The three major OMCs — Indian Oil (IOCL), Bharat Petroleum (BPCL), and Hindustan Petroleum (HPCL) — have mobile apps and websites that list fuel stations with some product information:

• IndianOil ONE app — lists stations and shows fuel types available
• SmartDrive (BPCL) app — station locator with fuel information
• HP Pay app — HPCL station finder

The limitation: these apps rarely show the exact ethanol percentage. They may list “MS” (motor spirit) without specifying whether it’s E10 or E20. Still, they are useful for locating stations and checking if a station sells premium fuels, which may have a different blend ratio.

It is worth noting that OMCs have the data to provide pump-level blend information in real time. Their supply chain management systems track every tanker dispatch, every delivery, and every batch. The information exists — it is simply not shared with the end consumer.

Method 4: Premium fuels — a partial escape?

Premium petrol brands — IOCL’s XtraPremium, BPCL’s Speed, HPCL’s poWer 99 — are often marketed as higher-octane options. The critical question is: are they still E20?

As of mid-2026, premium fuels are also E20-blended in most locations. The BIS specification applies to all motor spirit grades. Some OMCs have explored lower-ethanol premium blends, but there is no nationwide guarantee that buying premium gets you less ethanol. Always ask.

The premium fuels do typically contain additive packages (detergents, corrosion inhibitors) that may partially mitigate some of ethanol’s harsher effects on fuel system components. However, the ~6–7% energy deficit from the ethanol content remains regardless of the premium additives. You are paying more per litre for fuel that still delivers less energy than E0.

Method 5: Physical fuel testing

If you want certainty about what’s in your tank, you can test the fuel:

The water-separation test (DIY)

Ethanol is hygroscopic — it absorbs water. This property can be used for a rough test:

1. Collect a small sample of petrol in a clean, graduated glass container (a measuring cylinder works well).
2. Note the volume precisely (e.g., 100 ml). Mark the level on the container.
3. Add a known amount of water (e.g., 10 ml) and shake vigorously for 30–60 seconds.
4. Let it settle for 15–20 minutes in a stable, upright position.
5. The water layer at the bottom will be larger than the 10 ml you added — the extra volume is the ethanol that dissolved into the water layer.

This gives a rough estimate. It is not laboratory-grade, but it can distinguish between E5, E10, and E20 reasonably well. For E20, the water layer should be approximately 30 ml (10 ml water + ~20 ml ethanol from the 100 ml sample). For E10, expect roughly 20 ml. For E0 or near-zero ethanol, the water layer should remain very close to the original 10 ml you added.

Important caveats for this test: use a clean glass container (plastic may react with petrol). Perform the test in a well-ventilated area away from ignition sources. Dispose of the tested fuel safely — do not pour it back into your tank or down a drain. Ambient temperature affects the accuracy; aim for a room-temperature test (25–30 degrees Celsius).

Lab testing

BIS-accredited labs can test fuel samples for exact ethanol content, octane rating, vapour pressure, and other parameters specified in IS 2796. This is relevant if you suspect the fuel is adulterated beyond the specified 20% or contains contaminants. Contact your nearest BIS-listed petroleum testing laboratory. The cost is typically ₹2,000–5,000 per sample, depending on the range of tests requested. A basic ethanol-content test is at the lower end; a full IS 2796 compliance test costs more.

To collect a valid lab sample: use a clean, sealed glass or approved metal container. Fill it nearly to the top (minimising air space), seal it tightly, and label it with the pump name, location, date, time, and your name. Deliver it to the lab as quickly as possible — ethanol content can change with evaporation and moisture absorption if stored improperly.

How other countries handle fuel labelling

India’s approach to fuel blend disclosure falls well behind international norms:

The contrast is stark. Countries that mandate ethanol blending also mandate clear, standardised, enforced labelling. India has the mandate without the transparency.

What you cannot do (yet)

There is currently no nationwide real-time database showing the exact ethanol percentage at each of India’s 80,000+ fuel stations. This is one of the transparency gaps the VahanChod movement highlights:

• Consumers cannot make informed fuel choices without clear, standardised labelling.
• There is no independent, pump-level quality monitoring accessible to the public.
• OMCs control the data, and there is no regulatory requirement to publish pump-level blend ratios.
• The PNGRB does not maintain a public-facing compliance database showing which pumps are correctly labelled and which are not.
• Filing an RTI (Right to Information) request with the MoPNG or individual OMCs for blend data at specific pumps is technically possible but slow, and the responses often cite “commercial sensitivity” to withhold detailed information.

What should change

The demand is straightforward: every fuel dispenser should clearly display the ethanol percentage of the fuel it is dispensing, and this data should be available on OMC apps in real time. This is not a radical ask — it is basic consumer transparency that every comparable country already delivers.

Specifically, the movement calls for:

• Standardised, uniform labels on every dispenser nozzle showing the ethanol blend (e.g., “E20” in a clear symbol), following the EU model.
• Mandatory printing of ethanol percentage on every fuel receipt.
• Real-time blend data in OMC apps, showing the ethanol content at each station.
• PNGRB enforcement of existing display requirements, with published compliance data.
• A government-maintained public database of fuel quality test results, accessible online.

Until these changes happen, the methods described above are the best tools available. None of them are as simple as looking at a label — because the label, in most cases, is not there.