Teen Drives On One Tank Of Gas For Entire Summer (VIDEO)

20-year-old Danni Brancaccio vowed to drive the entire summer on one tank of gas. With 238 miles and 55 days behind her, the Portland, Oregon teen has alternated between her 1997 Honda Civic, the public bus and walking.

In her blog the Northwestern University junior reflected on her summer goal.

So today was both day 7 and the final day of my zero miles goal. I had a doctor's appointment this morning, and in order to make it there on time I used my car. It was a short distance, about 2.5 miles, and it was necessary for me in this situation. Using my car to get to my appointment reminds me of what my challenge is about. Driving more slowly, using cruise control, making the car's tires are properly inflated, and not letting the engine idle are all ways to take a tank of gas and stretch it farther. So in addition to my biking and busing, I hope to continue to drive responsibly throughout my challenge.

Watch Danni's interview with Fox News.