If you chose a diesel pickup over a gas-driven one, then you're already ahead of the game when it comes to fuel economy. According to the Department of Energy, diesel vehicles can be 30-35% more ...

Maintaining your car's engine air filters, spark plugs, tires, and oxygen sensors and ensuring they're all in good shape can ...

Some mechanics might try to sell you a new air filter, claiming a clogged one will hurt gas mileage, but for most customers, ...