Feb 18 2008

Tips for Pumping Gas Before That Big Camping Trip!

Have you ever seen this sign at your gas station either in your neighborhood or on the Interstate?  gas-prices_edited1.jpgDoesn’t it just send a chill down your spine?  Poor gas mileage, long trips, and this sign can really put a damper on your upcoming camping trip.  I haven’t checked these tips out scientifically, but I am willing to give it a try if it will help ease the pain at the pumps.


♦Only buy or fill up your car or truck or RV in the early 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 gasoline.  When it gets warmer gasoline expands, so buying in the afternoon or in the evening…your gallon is not exactly a gallon.  In the petroleum business, the specific gravity and the temperature of the gasoline, diesel and jet fuel, ethanol and other petroleum products plays an important role.  A one-degree rise in temperature is a big deal for this business.  But the service stations do not have temperature compensation at the pumps.

♦When you’re filling up do not squeeze the trigger of the nozzle to a fast mode.  If you look you will see that the trigger has three (3) stages:  low, middle, and high.  In the slow mode you should be pumping on slow speed, thereby minimizing the vapors that are created while you are pumping.  All hoses at the pump have a vapor return.  If you are pumping on the fast rate, some of the liquid that goes into your tank becomes vapor.  Those vapors are being sucked up and back into the underground storage tank so you’re getting less worth for your money. 

♦One of the most important tips is to fill up when your gas tank is HALF-FULL or HALF-EMPTY.  The reason for this is, the more gas you have in your tank the less air occupying its empty space.  Gasoline evaporates faster than you can imagine.  Gasoline storage tanks have an internal floating roof.  This roof serves as zero clearance between the gas and the atmosphere, so it minimizes the evaporation. 

♦Another reminder, if there is a gasoline truck pumping into the storage tanks when you stop to buy gas, DO NOT fill up.  Most likely the gasoline is being stirred up as the gas is being delivered, and you might pick up some of the dirt that normally settles on the bottom.

            Courtesy of an employee of Kinder Morgan Pipeline of San Jose, CA



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