Getting The Most For Your Money At The Pumps

Home Inspector with Clarksville Home Inspections

Below are some useful tips I received for getting the best value at the pumps.

Only buy or fill up your car or truck 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 expan ds, 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
1-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 slow mode you should be pumping on low spe ed, 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
to 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.
Unlike service stations, here where I work, every truck that we load is
temperature compensated so that every gallon is actually the exact amount.

Another reminder, if there is a gasoline truck pumping int o 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.

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


Comments (1)

Terry & Bonnie Westbrook
Westbrook Realty Broker-Owner - Grand Rapids, MI
Westbrook Realty - Grand Rapids Forest Hills MI Re
When I'm running on empty I just want to fill up. I never thought about the differences that might occur with temperature and speed of pumping. It might be too much for me. Thanks for the info.
Feb 25, 2008 09:52 AM