Some 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.  Actually this can be noticed in the Fuel gauge (which indicates  Fuel level in the Tank) movement. Whereas the Indicator (in the Fuel gauge in the dashboard) moves slowly upto halfway stage, after the halfway  stage the movement is rapid. This is because the air inside the Fuel Tank increases the evaporation of the Fuel resulting in fuel level going down  even without Engine being in operation.

 Another useful  information is to avoid filling up if there is a fuel truck pumping into  the storage tanks when you stop to buy. Most likely, the  petrol/diesel is  being stirred up as the fuel is being delivered, and you might pick up  some of the dirt that normally settles on the bottom.

 Hope this will  help you get the most value for your money.

 DO  SHARE THESE TIPS WITH OTHERS - IT IS IMPORTANT FOR AS MANY PEOPLE TO KNOW  ABOUT THIS,  ESPECIALLY IN THE WAKE OF RISING PETROL  PRICES.