Water in your gas

Since saving money on gas is important to everyone, with or without a car, fuel economy affects all of us. Water in gasoline is the number one fuel economy reducer. So how does it get there?

Water gets into your gas in stages. Depending on the handling of your gasoline, the time of your purchase and your own maintenance of it, in some cases the amount of water will be greater than the actual gasoline content of your tank.

How is that?
Gasoline is refined from crude oil. As it breaks down, the flammable portion of the gas separates from the remaining chemicals. One of the resultant chemicals is water. The only way for gas to break down is to be in contact with air. The oxygen in the air interacts with the gasoline causing it to fume. This effect is noticeable when you pump gas into a gas can. You will be able to see the flammable portion of the gasoline swirling in the air above the opening.

Gasoline evaporates at a remarkable rate. The more air in your tank, the faster the gasoline evaporates and breaks down into poorly burning fuel.

What does that do to fuel economy?
Water is a natural fire extinguisher. A mixture of gas and water will not burn as hot as gasoline alone. This is why the gas burns from the tank faster when the gauge is lower. It takes more volume to get the same amount of gasoline when it is mixed with water. As the fuel pump churns the liquid from the tank, the heavier water mixes with the gas.

Lower temperature burning gasoline reduces fuel economy considerably. By design, your tank backfills with air as you burn out the gasoline. When your gauge reaches half, get to a pump.

Does it only happen to my car?
Oil refineries' gasoline storage tanks have a floating ceiling to keep zero atmosphere from touching the gasoline. With minimal evaporation, the gasoline neither evaporates or degrades before it is trucked to gas stations.

The gas station does not have this measure in place. Their tanks are lined metal and backfill with air the same way your gas tank does. The longer the gasoline is in their tank, the more the gas will degrade, increasing the water content.

How do I stop it?
Keeping your tank full and buying gasoline the day after it is delivered are two ways to keep the least amount of water in your gas tank. The third way is to treat your gasoline once per month or every two thousand miles.

When you treat your gas, the water that is at the bottom of the tank goes through the engine at a faster rate. The qualities of the gas treatment will raise the octane level of your gas, causing it to burn hotter.

This increase in temperature ensures that the water is burned away completely. An added bonus to this is that it reduces the amount of rust and debris that can clog fuel injection systems.

The last step to keeping water out of your gas is to purchase and maintain a locking sealant gas cap. By preventing the gas fumes from escaping, the gas cap also keeps ambient air from condensing in the top of the gas tank. This condensation increases the water content.

Buy appropriate grade gasoline for your vehicle, maintain your gasoline, cap your tank and treat your tank regularly. These are the most efficient ways to keep water out of your gas.

Visit Virginia's Dream. International shipping available on request.