O'Reilly Auto News Feed

Fuel & Emissions

For many years, drivers believed that replacing their air filter would help improve their fuel economy.

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September 30, 2011

Big change to NASCAR engines

NASCAR has announced that going forward, all vehicles racing in the competition will be using fuel-injected engines, rather than carburetors, in an effort to make the cars on the track a bit closer to those out on America's highways.

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Gasoline engines rely on either carburetors or fuel injection systems to deliver the correct ratio of fuel and air to the combustion chamber, which powers the engine and allows the car to run.

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The fuel pump is the auto part that brings gasoline from the fuel tank to the engine so that it can be combusted and you can drive your car around.

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