Out of the six tests listed, two of them -- tire pressure variations and using an air conditioner -- had little to no effect, while the rest of them netted measurable differences. The underlying principle behind better fuel efficiency mirrors that of my Total Health Program: Adopting lifestyle changes that make a big difference.

For example, the best way to ensure better gas mileage by far, according to the Edmunds.com experts, is to stop driving like a maniac. By taking pains to brake easier and slow down, you'll save more fuel -- 37 percent -- than any other method.

If aggressive driving, peppered with bouts of anger, is a challenge, learn better, safer ways to handle those strong feelings. One natural means is the Emotional Freedom Technique, the energy psychology tool used daily in my practice.

You may also want to consider the Insight/Focus CD Systems that feature a more rapid kind of brain-wave entrainment. which allows you to achieve your goals in a fraction of the time.