One of the most important tip is to fill up when your tank is HALF FULL.
The reason for this is because the more fuel you have in your tank, the less air occupies the empty space.
-Buy or "fill up" your car early in the morning when the ground temperature is still cold. Remember that all service stations have their storage tanks buried below ground.
-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.
-When you're filling up, do not squeeze the trigger of the nozzle to fast mode. If you look closely, you will see that the trigger has three (3) stages: low, middle, and high.
-In slow mode, you should be pumping on low speed, thereby minimizing the vapours that are created while you are pumping.
-If you are pumping on the fast rate, some of the liquid that goes to your tank becomes vapour.
-Those vapours are being sucked up and back into the underground storage tank so you're getting less worth for your money.
-Another reminder, if there is a fuel truck pumping into the storage tanks when you stop to buy, DO NOT fill up - most likely the petrol/diesel is being stirred up as the fuel is being delivered and it might pick up some of the dirt that normally settles on the bottom.
Do share these tips with others