The husband and wife team of hyper-milers fuel stretchers have just broken their own "48 Contiguous U.S. States Fuel Economy Guinness World Record" with an average of 67.9 miles per gallon.

Wayne Gerdes offers some hand tips for improving fuel efficiency in everyday driving. A new Toyota Prius LE has smashed the Guinness World Record for lowest fuel consumption driving from the west ...

A truck powered by hydrogen traveled 1,806 miles on a single tank of hydrogen with zero emissions and set a new Guinness World Record.

volkswagen passat tdi® clean diesel sets world record for fuel economy around the lower 48 u.s. states - at 77.99 mpg! Volkswagen of America beats the GUINNESS WORLD RECORDS® achievement for the ...