Checking Petrol Purity: When refuelling, every driver wonders whether the petrol is pure and if they are receiving the exact quantity they paid for. Amidst constantly rising prices, verifying the quality and correct quantity of petrol has become more important than ever.

If you suspect poor quality or short delivery (lesser quantity), you can check this on the spot using a few simple methods. The Government of India and oil marketing companies have established specific standards for petrol quality and quantity. As a customer, it is crucial to be aware of these norms so that you can immediately demand an inspection if any discrepancy arises.

Why checking petrol quality is important

Using adulterated or poor-quality petrol can lead to numerous issues, such as impaired engine performance and reduced mileage. It can cause engine knocking or misfiring and damage fuel injectors and engine components. It also increases pollution levels. Therefore, when refuelling, one should pay attention not only to the price but also to the fuel’s quality.

Check petrol purity using the filter paper test

The easiest way to check petrol purity is the filter paper test, also known as the blotting paper test. To perform this, take a piece of white filter paper and place about two drops of petrol on it. Then, wait for approximately two minutes. If the petrol is pure, it will evaporate completely, leaving no mark on the paper. However, if there is adulteration, a yellow, brown, or black stain—or an oily residue—may remain on the paper. Such marks indicate the presence of adulterants or impurities.

Identify by observing petrol colour and odour

Pure petrol is generally slightly transparent and has a characteristic petrol smell. If the colour appears unusual or the odour seems different, you should exercise caution. Always ensure the machine displays ‘Zero’ before filling with petrol.

What is a density test?

The density test is a crucial method for checking the quality of petrol. Petrol pumps are equipped with density charts and density measuring devices. At a temperature of 15°C, the normal density of petrol typically ranges between 720 and 775 kilograms per cubic meter (kg/m³) or 0.720 and 0.775 g/ml. If the reading deviates significantly from this normal range, it may raise doubts about the quality.

How is the density test conducted?

If you have any doubts, ask the petrol pump attendant to perform a density test. They can measure the density using the designated equipment and compare the reading against the chart. Verify the correct quantity using the 5-litre measure test. If you suspect you have received less petrol, you can request a check using a certified 5-litre measure; this is a customer’s right.

How is the 5-litre test conducted?

Petrol pumps are equipped with a certified 5-litre measuring container. Petrol is dispensed from the machine into this container. If the quantity is accurate, the machine is considered to be functioning correctly. If the discrepancy exceeds the permissible limit, further investigation can be carried out. This is the customer’s right.

How can you check today’s petrol rate in your city?

Petrol and diesel prices in India are updated daily at 6:00 AM. You can check the latest rates for your city through various methods, such as SMS, official websites, or mobile apps.

Via SMS

If you want to know the Indian Oil (IOCL) petrol rate, type ‘RSP <City Code>’ and send it to 9224992249. Other oil companies also offer similar SMS services.

Via Official Website

You can visit the oil company’s official website or mobile app, select your state and city, and view the latest petrol and diesel prices. Mobile Apps: Information on the day’s petrol rates, nearby petrol pumps, digital payment options, and other services can also be obtained through oil companies’ official mobile apps.

Petrol Price in Kanpur on July 23, 2026
According to available information, the price of petrol in Kanpur on July 23, 2026, is approximately ₹101.59 per litre. Please note that prices may vary due to local taxes, transportation costs, or daily price revisions. Therefore, it is advisable to check the latest rates for your city before refuelling.

What to do if petrol is adulterated?

If you suspect that the petrol is adulterated, inform the petrol pump manager immediately. Request a filter paper test and a density test. Also, keep the receipt safe. Record the details in the complaint register. Subsequently, lodge a complaint with the oil company’s customer service centre. If necessary, contact the District Legal Metrology Department or the relevant consumer forum.

Conclusion

A little vigilance while refuelling can save you from financial loss and vehicle-related technical issues. Simple checks—such as the filter paper test, density test, verification of the 5-litre certified measure, and ensuring the meter starts at a ‘Zero Reading’—can help you largely ascertain the quality and correct quantity of the petrol. Additionally, it is best to refuel only after checking the daily updated petrol rates via SMS, mobile apps, or official websites.