Below are some tips to help you buy gasoline to avoid fraud and make a profit.

Refill fuel according to capacity

Many people often buy gasoline in round amounts such as 20,000, 30,000, 50,000 VND... but this way of buying will create favorable conditions for fraudulent behavior by gas station employees, because the stealing programs on gas pumps are often programmed according to the amount of money.

To avoid being "pickpocketed" when filling up gas, users should buy by capacity such as 1 liter, 2 liters... depending on the vehicle's gas tank.

Do not fill the tank full

Just fill up with the right amount of gas for the trip, the less gas, the lighter the vehicle, the more fuel efficient it will be.

If the gas tank is full, consumers are very vulnerable to fraud. Because of the reverse suction mechanism of the automatic pump "trigger", when the gas is filled up and reaches the edge of the pump nozzle, which is the safety threshold to prevent gas from overflowing, the pump will automatically control the trigger to stop the pump. This invisibly causes the gas station staff to limit the tank's full limit, the gas indicator will still run but the amount of gas poured in will be less than the displayed index.

Do not fill the tank full. Photo: Internet

Fill up with gas when there is 1/2 tank left

When filling up the tank, you should press the valve to let the fuel flow slowly into the tank. Because when the fuel flows quickly and strongly into the tank, the fuel expands more.

If you let the gas tank run completely empty, when you fill it up, the gas flowing down will encounter greater pressure, causing the gas to expand in volume. When the gas is half full, the distance from the gas nozzle to the new gas falls in will decrease and the pressure in the gas tank will not be as high as when the gas tank is empty.

Choose the time to fill up

Gasoline expands or contracts depending on the temperature. In the morning, when the weather is cooler, the gas contracts and reduces in volume overnight, so it is most beneficial to fill up early in the morning. On the other hand, during the hottest part of the day, when you pay for 10 liters of gas, you may only receive 9.1-9.3 liters, the rest is just vapor. Therefore, it is better to buy gas in the morning when the temperature is still low.

Also, do not refuel while the tanker truck is pumping gasoline into the gas station's tank. When the tanker truck is pouring gasoline into the tank, it increases the pressure in the gas station's tank, causing the gasoline to expand. Then, we have to buy a certain amount of gasoline gas and vapor.

Self-measuring fuel

Many people, every time they buy gasoline, take out a can to measure it before pouring it into the motorbike's tank. This method may seem inconvenient, but it is probably the most effective way to buy the right amount of gasoline for the money they spent.

Buy according to "taxi wings"

You should buy gas at gas stations that are frequented by taxi or truck drivers. Taxi or truck drivers travel frequently and therefore have a lot of experience with gasoline.

Do not buy gas when two people are operating at the same time.

When you see a gas pump with two people working at the same time: one pumping and one dialing, there is a 95% chance that the gas station is cheating.

Requires the meter to be set to “0″ before pumping.

Because there are many customers or because they are far from the pump, many employees often leave the meter as it was at the previous pump and continue to sell you gas. This, whether intentional or not, will cause customers to suffer, because there is always an error in the calculation of the price between the two pumps.

Look carefully when buying gasoline

First, you can detect any suspicious behavior from the gas station staff. Second, you can know whether the gas meter is displayed properly or not, and whether the numbers are jumping. Some gas stations have the “trick” of extending the gas pump hose far away so that customers cannot see the meter, you should also pay attention.

Check gasoline quality

When buying gasoline, customers can ask the gas station staff to drop a few drops of gasoline on their fingertips. If they see a greasy, sticky phenomenon, the gasoline is likely mixed with oil. You can also test gasoline by dropping a few drops of gasoline on a piece of white paper, then let the gasoline evaporate. If you see dirt, it means the gasoline has been mixed with oil. If there are no stains, you can rest assured about the quality of the gasoline.

Compare between purchases

There are always fixed gas stations on the way to work, you can check by buying a certain amount of gas and then check the gas line on the car to compare with the next time and different gas stations. Based on the number of liters and kilometers traveled in each purchase to choose the gas station that you feel most confident.

Avoid evaporation

Avoid evaporation by keeping the gas cap tightly closed and parking in the shade. This will also save you a lot of gas.

Don't fill up with too much gas at "strange" gas stations.

Estimate how much gas you need to complete your trip and get to your usual gas station.

Fill with the correct type of gasoline

Each type of vehicle will be suitable for different types of gasoline. Filling the right type of gasoline in the vehicle will help the vehicle save energy significantly. If the wrong type is filled, the gasoline will not burn completely and will create residue in the vehicle, causing the vehicle to consume more gasoline.

Boycott fraudulent gas stations

Consumers have every right to boycott gas stations that show signs of fraudulent and deceptive business practices and warn others against such fraudulent behavior, and report to the police if there is specific and clear evidence.