Tips on Pumping Gas

This info was sent to me in an e-mail, and I thought them worth passing on…

Here are some tricks to get more of your money’s worth for every gallon.

  • 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 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 1-degree rise in temperature is a big deal for this business. But the service stations do not have temperature compensation at the pumps, so you get less gas than you pay for.
  • When you’re filling up, squeeze the trigger of the nozzle only to the “low” 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 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 to your tank becomes vapor. Those vapors are being sucked up and back into the underground storage tank so you’re getting less gas for your money.
  • 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.
  • 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.

I hope these tips help you get more for your money!



See the Stretch Your Dollar Page for other money-saving ideas.


7 Responses to “Tips on Pumping Gas”

  1. Jenny Says:

    Hey! Just found you as I was tag surfing. This is info that I haven’t seen before and I’ll keep it in mind. Thanks for posting it!

  2. In The Hole Says:

    I love info like this! Thanks for sharing!

  3. Pre-Cleaning for the Cleaning Lady « Are You Going To Be This Way The Rest of The Time I Know You? Says:

    […] have a cleaning girl of my own. On one salary it’s hard enough to pay for groceries. And gas. So when the laundry needs to be done and the floors need to be washed and the carpet needs […]

  4. Change Some Habits, Save Some Gas. And Some Money. « Are You Going To Be This Way The Rest of The Time I Know You? Says:

    […] And Some Money. March 30, 2008 — BeThisWay A few months ago I wrote a post that gave Tips on Pumping Gas. It gives some pretty good ideas for stretching your dollar at the […]

  5. BeThisWay Says:


    Actually, it isn’t a hoax. Sure, some of the methods’ effectiveness is debatable, but why not err on the side of caution?

    Also, I just read this article yesterday, which talks about how several warm weather states are suing for being overcharged for gas.

    I guess we’ll see!

  6. Take The Park the Car Challenge « Are You Going To Be This Way The Rest of The Time I Know You? Says:

    […] us, especially those of us with SUVs, crying into our cereal. I’m following lots of tips to save money on gas, but have come to the realization that the best way to save on gas is to simply drive […]

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