Volkswagen R

We're just four days into the Volkswagen diesel-emission cheating scandal, but it's not too early to ask about its ultimate ramifications. The 482,000 VW and Audi cars being investigated by the EPA are a majority of all the diesel passenger cars sold in the U.S. since 2008, when new and tougher emission limits took effect. If VW Group's engineers had to cheat to get those cars to perform acceptably once they passed the tests, then what does that say about the future of diesel passenger vehicles? DON'T MISS: VW Diesel Emissions Recall: What You Need To Know In 10 Questions It's important to...