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VW Golf TDI circles US on less than $300 of diesel

$294.98. That's how much it cost the Volkswagen team to drive across all 48 contiguous states in the union. Which is pretty impressive, but it's only part of the story. In an effort to demonstrate just how economical a conventional diesel engine can be, VW sent a team out from its US headquarters in Herndon, VA, in a Golf TDI. Their mission was to visit all the Lower 48 on as little fuel as possible. Over the course of 16 days, they traveled 8,233.5 miles, burned through 101.43 gallons of fuel, and marked a frankly astonishing average of 81.17 miles per gallon. As a result, the team – made up of hypermiling automotive journalist Wayne Gerdes and electronics engineer Bob Winger – picked up a new Guinness World Record for the lowest fuel consumption achieved in a non-hybrid car across the 48 contiguous states. The previous record, it's worth noting, had also been set by VW and Gerdes, who piloted a 2013 Passat TDI at just a hair under 80 mpg. But here's the kicker: in raising the diesel economy bar even higher, the team also beat the record for the same achievement in a hybrid vehicle by over six mpg. So the next time someone tries to tell you a hybrid is more efficient than a diesel (at least on the highway), you can point them towards this record. Related Video: VOLKSWAGEN GOLF TDI® ROUNDS LOWER 48 STATES ON LESS THAN $300 OF CLEAN DIESEL, SETS GUINNESS WORLD RECORDS™ ACHIEVEMENT FOR FUEL ECONOMY Golf TDI® beats the GUINNESS WORLD RECORDS™ achievement for "lowest fuel consumption—48 U.S. contiguous States for a non-hybrid car" at a stellar 81.17 mpg Herndon, Va. — Volkswagen of America, Inc., is pleased to announce today that the 2015 Golf TDI® Clean Diesel, part of the family of vehicles that won the 2015 North American Car of the Year, has set a new GUINNESS WORLD RECORDS® achievement for the "lowest fuel consumption—48 U.S. contiguous States for a non-hybrid car" with a remarkable 81.17 mpg. Traveling 8,233.5 miles around America in 16 days on $294.98 of Shell® Diesel fuel, the Golf beat the previous mark of 77.99 mpg by more than 3 mpg, and also beat the hybrid vehicle record of 74.34 mpg by more than 6 mpg. "Covering 8,233.5 miles on just 101.43 gallons of Clean Diesel fuel is a remarkable accomplishment, and solid proof of the efficiency and fuel economy of Volkswagen's TDI® Clean Diesel vehicles," said Michael Horn, President and CEO, Volkswagen Group of America, Inc.

West Virginia researcher describes how Volkswagen got caught

The cheating scandal engulfing the world's largest automaker started with a road trip. In the spring of 2014, researchers from West Virginia were evaluating the tailpipe emissions of diesel cars made for the American market by European manufacturers, something never before studied in the academic realm. Excited by the prospect of breaking new ground, the team of two professors and two students wanted to gather as much data as possible. "And being academics, we went a little overboard," said Arvind Thiruvengadam, one of the students. "Being academics, we went a little overboard." Overboard included driving the cars for more miles than they needed to test and verify results. Drivers put about 1,500 miles on each of the first two cars in the study, a Volkswagen Jetta and BMW X5, along California roadways. For their final car, a Volkswagen Passat, they wanted even more mileage. So they took the car on a road trip from Los Angeles to Seattle and back again, collecting data from more than 2,000 miles of testing. The road trip was Volkswagen's undoing. When the West Virginia team returned to Los Angeles, they were befuddled by the test results. In theory, the Passat should have spewed the lowest levels of pollutants among the three cars. Equipped with the more modern selective catalytic reduction technology, the team expected to find minimal levels of nitrogen oxide. But the car, which had been certified at a California Air Resources Board facility prior to the start of the road trip, had elevated levels of NOx that were 20 times the baseline levels established beforehand. The researchers, comprised of professors Gregory Thompson and Dan Carder and students Marc Besch and Thiruvengadam, knew their on-board equipment functioned properly because, early in their research, they had double-checked its accuracy after recording sky-high NOx readings from the Jetta that showed 30 times the level of its baseline testing at the CARB facility. It was particularly noteworthy because the Jetta contained the first-generation Lean NOx Trap technology, not the more efficient SCR, yet both produced large discrepancies. The BMW, on the other hand, performed as expected. Today, Thiruvengadam is careful to say the research team never suspected Volkswagen of cheating on emissions testing, nor did the researchers report such a finding. They merely reported their findings to CARB officials who then further investigated.

VW offers to buy back new diesels if bans introduced

By Maria Sheahan FRANKFURT, Germany — Volkswagen will buy back new diesel cars if German cities ban them, it said on Thursday, seeking to reassure potential buyers and stem a plunge in sales of diesel vehicles. Europe's biggest automaker also said it would extend incentives for buyers of new diesel cars. The moves come after a German court ruled last month that cities in the country could ban the most polluting diesel vehicles from their streets. Many German cities exceed European Union limits on atmospheric nitrogen oxide, known to cause respiratory diseases. Fears of bans have led to a plunge in demand for diesel vehicles, which are also key to carmakers' attempts to meet new EU rules on carbon dioxide (CO2) emissions. While diesel cars are heavily criticized for emitting nitrogen oxide, they spew out less CO2 than gasoline equivalents. Diesel car sales plunged 19 percent in Germany last month. At its core VW brand, Volkswagen said its buyback offer applied to new diesels bought between April 1 and the end of 2018 and would kick in if the city in which the buyer lived or worked banned diesels within three years of the purchase. It said its dealerships would buy back diesel vehicles affected by bans at their current value if their owners at the same time bought a new vehicle that was not affected by cities' driving restrictions. At Czech brand Skoda, the guarantee applies to cars bought between April 1 and the end of June, but will cover bans introduced within four years of the purchase date. At premium brand Audi, the offer only covers leased vehicles. Volkswagen also said it was extending to the end of June incentives for customers trading in older diesels for new ones. Fellow German carmaker BMW said earlier this month it would offer to take back leased vehicles if diesels were banned within 100 kilometers (62 miles) of the operator's home or place of work. There has been a global backlash against diesel-engine cars since Volkswagen admitted in 2015 to cheating U.S. exhaust tests. But Germany's government is seeking to avoid widespread bans on heavily polluting diesel vehicles, which companies say could cut the resale value of up to 15 million vehicles in Europe's biggest car market. In Germany, where motorists expect to drive powerful cars on motorways with no speed limits, any restrictions will be unpopular.