If you go on a road trip with Wayne Gerdes, be sure to hit the restroom before you leave. He won't be stopping off for gas a lot — and he has a world record to prove it.
Gerdes (pictured, far left), a veteran practitioner of "hypermiling," this week added another mileage milestone to his list of more than 100 when he and his co-pilot, Bob Winger (pictured, middle, with Guinness World Records adjudicator Philip Robertson to the right), broke the Guinness World Record in the "lowest fuel consumption — 48 U.S. states for a non-hybrid car" category, driving a Volkswagen Passat TDI diesel sedan. The Passat averaged 77.99 mpg on the 8,122-mile trip, more than 10 mpg better than the previous non-hybrid record, and more than 13 mpg better than the record for a hybrid, according to Volkswagen.
Gerdes, founder of Cleanmpg.com and primary driver in the attempt, and Winger, an electronics engineer, embarked on their long drive on June 7 from Herndon, Va., with their tires touching every one of the contiguous 48 states before they made it back on Monday. They used less than 105 gallons of diesel fuel during the entire trip.