Tips for Saving Money at the Gas Pump

It's on everyone's mind and it's hitting almost everyone's wallet: Gas prices and their seemingly endless ascent skyward.

An ABC News/Washington Post poll found that more than two-thirds of Americans say the price of gasoline is causing financial hardship for them or their families.

How Are You Dealing With Gas Prices? Tell ABC News.

The price of gasoline is being driven up by high oil prices, which are rising because of growing worldwide demand for oil. Even as demand begins to decrease in the United States and other Western countries, demand continues to grow in developing nations like China and India.

But the picture is more complex than that.

Investors, worried about the stock market and the health of businesses hurt by the problems with credit markets, are taking money out of the stock market and buying things like oil or corn.

Further compounding the problem is that oil is priced in U.S. dollars. As the dollar weakens against foreign currencies, the price of oil goes up for American consumers like Thomas J Palmer.

When gas prices got tough, Palmer got creative. The Marietta, Ga., man took the keys to one of the two cars he shares with his wife, put them in water and stuck them in the freezer. The car has sat dormant ever since.

But you don't have to resort to key-freezing to help cope with rising gas prices. Here are some tips from the Federal Trade Commission that should put a few extra dollars in your wallet.

Choose the right octane. For most cars, the recommended gas is regular octane. Using a higher octane gas than the manufacturer recommends offers no benefit, and it costs you at the pump. Unless your engine is knocking, buying higher octane gas is a waste of money.

Stay away from gas-savings gadgets. Be skeptical about any gadget promising to improve your mileage. The Environmental Protection Agency has tested more than 100 such devices -- including "mixture enhancers" and fuel line magnets -- and has found that very few provided any benefits. Those that worked provided only a slight improvement. Some can even damage your engine.

Stay within the speed limit. Gas mileage decreases rapidly at speeds above 60 mph.

Avoid unnecessary idling. It wastes fuel, costs you money and pollutes the air. Turn off the engine if you anticipate a wait.

Stop and start gently. You can improve in-town gas mileage by up to 5 percent by driving gently.

Use overdrive and cruise control. They improve fuel economy when you're driving on the highway.

Inflate your tires. Keeping your tires properly inflated and aligned can increase gas mileage up to 3 percent.

Keep your engine tuned. Tuning your engine can increase gas mileage by an average of 4 percent.

Change your oil. Clean oil reduces wear caused by friction between moving parts and removes harmful substances from the engine. Motor oil that says "energy conserving" on the performance symbol of the American Petroleum Institute contains friction-reducing additives that can improve fuel economy.

Replace air filters regularly. Replacing clogged filters can increase gas mileage up to 10 percent.

Lose the junk in your trunk. An extra 100 pounds in the trunk can reduce fuel economy by up to 2 percent. Removing nonessential stuff can save you at the pump.

Combine errands. Several short trips taken from a cold start can use twice as much fuel as one trip covering the same distance when the engine is warm.

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