Is pumping gas in hot weather may cost more than in cold weather?

Question

Gas will expand more in hot weather than in cold weather and what you get is more fumes than gas. It this true?

Answer 1

Pumping Gas In Hot Weather May Cost More

Pumping gas in hot weather may leave drivers shortchanged.

You may not be getting a full gallon when you pull up to the pump, due to a phenomenon called "Hot Gas" that is plaguing motorists across the nation.

When temperatures at the pump rise above the legal standard of 60 degrees, gasoline expands. Under those conditions, a gallon is no longer a true gallon, but a gallon inflated by fumes.

A nationwide study revealed gasoline is being sold at pump temperatures averaging 65 degrees.

The oil companies apparently have the technology to provide temperature adjusting tanks at the gas stations, and they've chosen not to do it because they don't want to spend the money.

Based on current pricing, one estimate suggests motorists nationwide are paying $2.3 billion more a year. Of that amount, $500 million is coming from the wallets of California drivers.

The news has consumer groups outraged because they say the oil industry added temperature gauges in Canada because cold fuel was costing gasoline and diesel retailers there.

"They've been squeezing us for years," said Lenny Goldberg of the Utility Consumer Action Network. "The fact that they're not delivering an honestly measured product adds insult to injury for sure."

But the American Petroleum Institute, which represents the oil industry, says the Hot Gas problem is negligible and isn't worth fixing.

One estimate suggested it would cost the oil industry $2 billion to retrofit gas pumps nationwide.

Answer 2

Yes and no. Since the gas tank is underground and is not subject to intense heat variations it probably wont change due to the hot weather outside. Even if it did change the system is closed off from any leakage so the gasoline fumes in the tank will increase to a point of saturation and equilibrium will be reached. Thus it is all dependent on the amount of gas left in the tank and the space for the fumes to expand.

Answer 3

Not so it would make any difference.

This is for several reasons. Gas is actually formulated to summer and winter blends which control the volatility (rate of evaporation) of the liquid.
The fuel tank in your vehicle is relatively small and the expansion is minimal.
In a modern, fuel injected vehicle, any fumes or evaporation from the tank is routed into the intake manifold and burned along with a lessor amount of injected fuel to maintain the proper mixture.
All in all, it's really a non-issue.

Answer 4

It's true that the gasoline is less dense in hot weather, but you still get actual gasoline as opposed to fumes. The difference in actual volume is not so great that it would actually affect your wallet to any serious extent.

It costs more in hot weather because gasoline generally costs more anyway, because so many people are on vacation and increased demand means increased prices.

Answer 5

Sounds like good reasoning to me. However, the gas station tank is underground, and not likely to be affected in any significant way by temperature. Although you should get more vapor, the gas pump is not affected by vapor, but rather, it meters out gasoline based on it's liquid volume. Perhaps in a thousand gallons you might find a quart of difference between summer time and winter.

Answer 6

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Answer 7

Yes! You should pump gas in the morning all the time - before 10:00 am

Answer 8

Yes! won't make a huge difference, but every bit helps!

Answer 9

i would think so but Im not sure