What time of day should I fill my tank?

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  • mahelms2 Flag

    Think Again
    The temperature underground where the gas is stored doesn't change as significantly as the surface temperature. In fact, it barely changes.

David Rizzo
Dr. Road Map, Dr. Road Map
www.drroadmap.com  
(714) 879-8521

David, DR. ROADMAP, Rizzo burst upon the traffic scene in late 1987 as the first person in Los Angeles to offer alternate routes to motorists who were sick and tired of being stuck in traffic. In 1990 he released to the world the most comprehensive guide ever written of off-freeway commuting in Southern California. Two years later he became the first traffic reporter to offer daily alternate routes in real time over the air on one of the most popular morning radio shows in Los Angeles. Dr. Roadmap continues to provide COMMUTE MANAGEMENT solutions with the 2006 release of his book, "Survive the Drive! How to Beat Freeway Traffic in Southern California."

What time of day should I fill my tank?

David Rizzo, fuel economy expert, explains how to save money on gas.

This expert: 200,309 views

This series: 90,294 views

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Host: What time of day should I fill my tank? David Rizzo:Morning is best by far and here is why, they call it gas for a good reason. It is a gas, it expands, it is volatile. So the higher the temperature the more it fumes. You don't want fumes you want hard liquid when you put that gas in your tank. So fill up in the morning. Keep in mind that a baseline temperature is 60 degrees. For every 15 degrees above 60 you lose 1% volume. So, if you fill up on a 90 degree day you are losing 2% volume of gasoline. Gas companies say, oh, it's not that big a deal and that's why they won't put automatic temperature compensation devices on the pumps but guess what they do in Canada? They put those temperature control devices because they want the benefit of getting the volume in selling us fumes. So definitely fill up the morning.

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