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A newly released study finds that the emissions from post-2007, EPA-compliant diesel engines do not show risks of causing lung cancer in lab rats. The animals were exposed to the exhaust for 80 hours a week for up to 30 months. Previous studies have shown much more adverse effects from older diesels.

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Porsche may be getting rid of the V8 diesel option for the Cayenne SUV because upgrading to comply with European emissions standards is pricey.

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The newly unveiled Ram 1500 EcoDiesel HFE model brings the fullsize pickup closer than ever to 30 miles per gallon fuel economy. Thanks to the right mix of aerodynamics-improving measures, the model boosts the mileage of the standard diesel version to 29 mpg highway, 21 mpg city and 24 mpg combined. Its 3.0-liter diesel V6 still makes 240 horsepower and 420 pound-feet of torque and routes through the brand's eight-speed automatic gearbox.

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Almost all Jaguar Land Rover vehicles will get optional diesel engines in the next three years as part of the company's plans to increase fuel efficiency across its lineup.

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Full Titan Range Will Offer Multiple Engine, Cab, Bed Configurations

The 2016 Nissan Titan XD has arrived at the 2015 Detroit Auto Show, packing a 5.0-liter Cummins turbodiesel V8 with 310 hp and 555 lb-ft of torque. That means when properly equipped, the Titan XD can tow up to 12,000 pounds. Read all about it, here.

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From drag races to roominess comparison, the Mazda3 came out ahead of the Audi A3 and BMW 1-Series in a diesel-hatchback comparison.

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The Renault-Nissan Alliance bills itself as the worldwide leader in electric vehicles with a claimed 58 percent of the global market share. In the highly competitive world of increasingly efficient powertrains, development can never stand still if the company wants to maintain that dominance. Renault just held a show of its latest drivetrain prototypes. The most bizarre of them wasn't electrified, but it was so weird that it needed to be shared.

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Last month, Nissan and BMW helped stem a disconcerting (for green-car watchers, at least) trend of declining year-over-year sales, as increased demand for the Japanese and German automakers' plug-in models made November slightly less painful than October. The year-over year decline of hybrid, plug-in and diesel sales narrowed to 10 percent in November from 13 percent in October, as Americans bought more than 43,000 new green cars. Last month's plug-in sales reversed their temporary decline, incr

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Anyone even vaguely familiar with the European auto market knows that diesel-fueled vehicles take up a huge portion of the roads there. A combination of high fuel efficiency, useful torque in tightly packed cities, low CO2 emissions and tax incentives all contribute to the popularity. However, ever the iconoclasts, the French government wants the oil burners off its roads in the coming years.

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We won't even ask how much torque it'll produce, but we could easily see the number cresting 450 lb-ft.

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Between GM's ignition switches and Takata's airbags, it's been a big year for recalls, but they keep rolling in. The latest comes from Chrysler, which has announced a pair of recalls for certain heavy-duty pickups and SUVs.

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Jaguar Land Rover offers nearly all its models (save for the F-Type and outgoing XK) with diesel engines... it just doesn't offer any of them in the United States. But that's about to change, and that change is tipped to start with the Range Rover Evoque.

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Fans of small victories will appreciate the "progress" that Americans made with their purchases of green-car vehicles last month. Automakers and everyone else, though, will scratch their heads. That's because green-car sales had their fourth straight down month in September, as Americans purchased about 42,000 hybrids, plug-ins and diesels last month. And while the deficit compared to last year wasn't as steep as August's 11 percent year-over-year decline, sales were still down 9.6 percent and c

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Will BMW's Gas-Electric Tech Finally Do The Trick?

Rolls-Royce is not what you might characterize as one of the greenest automakers on the market. Its vehicles tend to be rather large, saddled with lots of plush leather, thick carpets and wood trim, and powered by twelve-cylinder engines in excess of six and a half liters. But that doesn't mean that the stoic British automaker isn't trying to clean up its act, even if its customers haven't responded in kind.

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Burning Extra-Virgin Olive Oil Is Cheaper But Less Exciting Than You'd Think

It used to be easier to make sense of the auto industry. There were mainstream manufacturers, and there were niche sports car manufacturers. That was before Porsche starting selling more crossovers than it does sports cars, Lamborghini began preparing to go down the same road, and Ferrari introduced an all-wheel-drive hatchback. But long before the arrival of the Cayenne, the unveiling of the Urus and the advent of the FF, the storied marque that is Maserati was already bolstering its sports car

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Audi is issuing a recall covering some 70,000 vehicles worldwide, due to problems with their brake boosters. According to Automotive News Europe, diesel-powered examples of the A4, A5, A6, A7 and Q7 are all being called back due to this issue.

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Is this water electrolysis hydrogen scheme for real?

Recently, we ran an article: LeefH2 wants to clean up pretty much every diesel engine and it mentioned the way HNO Green Fuels, the maker of the LeefH2, wants to create oxygen from a diesel engine while also reducing particulate matter. I had some concerns with that.

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Could the "Zoom Zoom" automaker start making hybrids that go "glug glug glug"? Mazda, known for its fuel-efficient Skyactiv engine line, will be the first Japanese automaker to make a diesel-hybrid vehicle for Japan and Europe.

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This Is What Happens When You Smoke Out A State Rep

It's always a few bad apples who ruin polluting just for fun for the rest of us. That time-honored American tradition of being rude for laughs, otherwise known as 'rolling coal,' might become illegal in New Jersey, if a Nissan Leaf-driving politician gets his way.

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The desire for more diesel vehicles on American roads has become a popular talking point among automotive enthusiasts. We hear about the super-efficient, high performance oil burners cruising all over Europe and don't see any reason that they couldn't work here. After all, their high torque figures and great range would seem like a perfect match for US roads, even if their fuel is generally more expensive than gasoline. It looks like General Motors might be listening, though. Steve Kiefer, the a

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Our Staff Voices Their Unpopular Opinions... How About You?

We all have controversial opinions. Be it whether you think the Nissan Juke is actually pretty attractive, manual transmissions aren't always better, or you honestly didn't hate the Pontiac Aztek, we all harbor some persuasion, be it big or small, for which we catch copious flak upon expression.

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