<snip>
BERKELEY, Calif. -- Mali Blotta and David Modersbach were unfazed by rising gas prices when they drove 11,000 miles during a recent family road trip from California to Argentina.
Their 24-year-old station wagon runs on much cheaper fuel: recycled vegetable oil.
Hitting the road for five months, the couple and their 4-year-old son toured 11 countries in a Volkswagen powered by waste grease they collected from restaurants and fried-food factories along the way.
The family didn't have trouble finding fuel at restaurants in Nevada, Utah and Arizona,but it wasn't so easy once they left the country.
http://www.wftv.com/automotive/3442024/detail.html