Tracking your car's gas mileage can help determine if it is getting decent fuel economy, and can help calculate drive costs. FuelLog is an Android app that can show you your MPG and provides lots ...

Step-1 Choosing the right GPS tracker for your vehicle: Plug-and-Play GPS tracker: These GPS trackers get connected directly to the OBD-II port of the vehicle and do not require any external wiring.

Joe Kueser’s $1 MPG (iTunes link) lets you keep track of all your mileage needs in a simple, easy to use iPhone application.

1. Track mileage and expenses. The first step in deducting the business use of your vehicle is to set up a system of record keeping to track how many of your vehicle miles are for business.

There's a risk involved when buying any used car, Consumer Reports says. But if you have to compromise, does age or mileage matter more when buying a used car?