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Do fuel additives really do anything?

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Do fuel additives do anything, or are the claims on the bottle just clever advertising? It might depend on your car. Learn more about fuel additives.

Do you really need to pay for that 30,000-mile service?

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The 30,000-mile service is the first major check up on a vehicle. Is it worth the cost? Find out at HowStuffWorks.

How old is the electric car?

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Electric cars aren't so new today. Turns out they have been around since before the Model T. Find out how old electric cars are at HowStuffWorks.

Is gasoline more dense in the morning?

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Is gasoline more dense in the morning? Should you fill up before the afternoon? Find out at HowStuffWorks.

Can you find the keypad code for a used car?

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What happens if you get a used car with a keypad system but not the code that goes with it? Find out if you can get the keypad code for a used car.

Can you sell a car that has been under water?

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Would selling your flood-damaged car help recover your losses? Is it even legal? Find out if you can sell a car that has been under water.

Can You Return a Used Car?

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If you just bought a used car and don't like it, can you return it? Find out and learn about used car returns at HowStuffWorks.

Do dealerships make more off new or used cars?

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New cars cost more than used cars, so dealerships must make more off the new ones, right? Find out at HowStuffWorks.

How long are you responsible for a car after you sell it?

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If you've sold a used car, the last thing you want is to be responsible for it after you sell it. Find out what you need to know at HowStuffWorks.

What’s the best time of year to buy a used car?

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When's the best time of year to buy a used car, and what else should you consider? Find out at HowStuffWorks.

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