Petrol Pump 5 Litre Test: ±25 ml Limit and How to Record It

The 5-litre test checks whether a nozzle gives the right quantity. You fill a certified 5-litre measure from the nozzle and see how close it is to 5 litres. The usual permissible error for fuel dispensers in India is ±25 ml per 5 litres. After the test, the fuel goes back into the tank, so the test litres must be subtracted from fuel sold for that shift.

How the test is done

1. Note the nozzle's totalizer reading before the test.
2. Fill the 5-litre measure. Let the foam settle and read the scale on the neck.
3. Note the reading after the test.
4. Check the measure: is it within 25 ml above or below the 5 L mark?
5. Pour the fuel back into the tank.
6. Record the result: date, time (IST), nozzle, before and after reading, pass or fail.

Legal Metrology inspectors may check this during a visit. Keeping a clean record of every test helps you show the pump is checked regularly.

The ±25 ml rule with an example

The limit grows with the quantity drawn. For a bigger draw, the allowed error is larger in the same ratio.

Tolerance (ml) = Litres drawn ÷ 5 × 25

Before reading : 10000.000
After reading  : 10005.005
Measured       : 5.005 L
Error          : 5.000 − 5.005 = −0.005 L = 5 ml
Limit for 5 L  : 25 ml   → PASS

If a nozzle fails, do not ignore it. Get the dispenser checked. Short delivery hurts customers and your licence. Extra delivery quietly eats your margin every day.

Why test litres must come off fuel sold

The meter only goes up. When you draw 5 litres for the test, the totalizer moves by 5 litres. But you poured that fuel back into the tank. Nobody paid for it. So if you calculate sales from readings alone, the shift will look short.

Fuel Sold = Closing − Opening − Test litres

One test missed at Rs.108.28  → 5 × 108.28  = Rs.541.40 false shortage
Two tests missed              → 10 × 108.28 = Rs.1,082.80 false shortage

This is one of the most common reasons an honest operator gets blamed for a shortage. Check the full shift formula in how to calculate shift sales.

Recording tests in the app

In Fuel Pump Book you can add any number of tests in a day. One test run covers all nozzles. You enter the readings before and after, and the app grades each one as pass or fail using the ±25 ml per 5 L rule. When you close the shift, the test litres are taken off fuel sold automatically, so the expected amount is right.