>So goes the old adage, but this time the apple is the doctor – fuel doctor, that is. Fuel Doctor USA has an electronic device which helps keep the electrical systems in your car clean and working properly – fueldoctorusa.com. So, devices such as fuel injection and engine timing equipment will work more efficiently thus boosting your mileage. The devices is also relatively inexpensive and will pay for itself in short order. Make an appointment to see the doctor right away.