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One of the most difficult tuning problems to overcome is the seemingly ever-present engine vacuum leak. Vacuum is an important component of the internal-combustion process because it controls basic ...

Unless you drive a fully electric vehicle, motor oil is an absolutely essential component for your car. Oil is the lifeblood of your vehicle's engine. It provides lubrication for all of the engine's ...

There's a lot going on inside your vehicle at any given time, whether you're idling at a red light or driving at freeway speeds. Much of this activity involves chemical reactions that — while ...