
A car's engine creates power through the combustion of air and fuel. In most modern, fuel-injected systems, the air and fuel mix together inside of the component known as the intake manifold. One end of the manifold consists of a single tube through which fresh air flows. The other end consists of multiple smaller tubes, each of which connect to one of your engine's cylinders.

The average American driver spends upwards of $2,500 on fuel every year. While you might not be able to escape buying fuel for your car, you can make an effort to control how much you spend on this expense without reducing how much you drive. Learn some of the practical things you can do to reduce your fuel costs by increasing fuel efficiency.