A team of 12 drivers embarked this weekend on “Truth in 48,” a bid to drive 2,800-plus miles from the Los Angeles area to New York in 48 hours or less on diesel power.

The team is driving the 2014 Audi A6 TDI and 2014 Audi A7 TDI sedans, with the 2014 Audi Q5 TDI as a support vehicle in a challenge to demonstrate the extended range and fuel economy provided by Audi clean diesel technology.

The rally, led by Wayne Gerdes of CleanMPG.com, will make only four refueling stops.

They departed from the Audi Pacific dealership in Torrance, CA, Saturday, Sept. 7 in the morning, with plans to conclude the drive at the Audi Manhattan dealership this afternoon.

Throughout the drive, the CleanMPG team will swap seats with members of the media, including Christian Moe of Road & Track, Damon Bell of Consumer Guide Automotive, Jill Ciminillo of Chicago Tribune and Sebastian Blanco of Autoblog Green.

Audi said that each Audi TDI clean diesel vehicle delivers up to 30 percent better fuel economy and 30 percent lower carbon dioxide emissions than their equivalent gasoline engines, resulting in longer range and fewer trips to the fuel pump.

By having more density than gasoline, Audi explained diesel packs more energy in the same amount of fuel which helps maximize the miles per gallon.

For Audi, the 2014 Audi A6, A7 and Q5 TDI clean diesel engine vehicles adds to Audi’s list of advanced technologies that help enhance fuel efficiency, including Audi ultra lightweight technology, Audi quattro and Audi e-tron.