Today I would like to provide some do's & Don'ts with filling up your gas tank.

DO'S:

First of all, always use the octane rating specified by the manufacturer.   You can no longer judge gas performance by listening for a knock.  Most newer cars detect a knock and the computer will adjust the ignition timing accordingly.  So you probably won't hear a knock but engine performance may be compromised.  Better to spend the extra money.

Always fill up when your gas tank is half empty.  This means less air in the tank and less evaporation.  Running your tank on empty too often may cause premature fuel pump failure, excessive moisture leading to rust and dirt from the bottom of the tank could clog up the fuel injectors.

DON'TS:

Do not fill your gas tank to the top.  This will cause more gasoline to be evaporated into the air and may also lead to excessive spillage.

Do not squeeze the pump handle so that gas is pumped at the maximum rate.  The high velocity will cause gas vapors that are lost into the air or sucked back into the underground tank.

Finally, the following short video demonstrates how not to fill your gas tank.