Wednesday, August 11, 2010
YOU SHOULD KNOW ABOUT THIS, ESPECIALLY IN THE WAKE OF RISING PETROL PRICES.
2 tips for filling petrol and diesel:-
Only buy or fill up your car or bike during early morning, when the ground temperature is still cold. Remember that all service stations have their storage tanks underground.. The colder the ground, the more dense the fuel. When it gets warmer, petrol expands. So, buying in the afternoon or in the evening, your litre is not exactly a litre. In the petroleum business, the specific gravity and the temperature play an important role. 1 degree rise in temperature is a big deal for this business. But the service stations do not have temperature compensation at the pumps.
Another most important tip is to fill up when your tank is HALF FULL. The reason for this is, the more fuel you have in your tank the less is the air occupying its empty space. Petrol evaporates faster than you can imagine.
The Kid said...
Now that is interesting. Very useful.
However cannot agree on the logic behind "filling up when the tank is half full".
Even though petrol evaporates faster, the tank is closed. So, after it saturates the petrol does not go anywhere. It has to condense.
On the other hand, if you fill when the tank is only half empty, you are opening the tank and this exposes the fuel to the outside air. This will cause much more evaporation.
So, it is hard to say if filling when you are half full saves anything.