#TDICleanDiesel

Volkswagen is working on a fix to bring their “defeat device” equipped cars back into EPA compliance. The SCR upgrade option is very costly and another possibility is a software fix. The latter option would likely come in the form of an ECM calibration that would work similar to “test mode” at all times, possibly robbing power and fuel economy.

The crew over at TFLCar attempted to emulate this test mode on a dyno but fell short of collecting reliable results.

While I applaud the idea of finding an affected car and trying to generate real-world test results, the tests and analysis in the video do not correlate to an actual EPA test.

Twelve days after early reports revealed that Volkswagen Of America’s TDI Clean Diesels weren’t so clean after all, Volkswagen reported a one-percent U.S. sales increase for the month of September 2015, the month in which the emissions fraud was revealed.

But did Volkswagen’s U.S. volume truly rise? And if so, what kind of extra volume is generated by a one-percent uptick? Moreover, while Volkswagen trickled forward with just its fourth year-over-year U.S. monthly sales improvement in 2015, what was the rest of the auto industry accomplishing?

A recent press release on the completion and success of a three-year program to test biofuels in Volkswagen Jetta and Passat TDI models may hint that two external companies had knowledge of the high levels of NOx produced by the “Clean Diesel” vehicles.

The two California-based companies — Solazyme and Amyris — were given the Volkswagen vehicles to test their fuels. VW announced that the program was a success a few months ago, stating CO2 emissions were reduced when using the biofuels. However, the companies only would have known their fuels produced less emissions if the biofuel companies tested the emissions output using diesel fuel and compared it with their own products.

Fans of Volkswagen diesels will be thrilled to know that later this year, the automaker’s latest 2-liter turbo-four will be available for the 2015 Golf, Jetta, Passat, Beetle and Beetle Convertible.