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9Today's semi trucks are a lot cleaner than they used to be

When it comes to diesel trucks, the good old days weren't so good. Go back a quarter-century, for instance. Back then, a single diesel-powered truck was throwing off about 60 times the emissions a typical "clean diesel" truck does today. Cough.

58June 2014: The looks-can-be-deceiving edition

For The First Time, Fusion Energy Beats Chevy Volt

We have to blame the VW oil burners and Malibu mild-hybrids.

82Ford rolls out diesel Focus ST at Goodwood [w/poll]

If you're in the market for a hot hatch, there are some excellent choices at your disposal – especially if you live in Europe. But if you want a diesel, well, your choices become rather more limited. Volkswagen tends to that niche market with the Golf GTD (essentially an oil-burning version of the GTI available Stateside), but that's about the extent of it. The pleas of those looking for more diesel-burning hot hatch choices haven't fallen on deaf ears at Ford, with the Blue Oval not only

2First-ever offer from EPA to tribes for cleaner diesel vehicles

US government handing out $1 million to improve air quality

Everyone deserves clean air, but the Environmental Protection Agency (EPA) has never directly offered diesel emission reduction program assistance to tribal (aka Native American) entities before. This is what makes a new announcement from the EPA about a million dollars targeted at reducing emissions from older diesel engines a bit more interesting than usual.

34Here's where green cars are the most popular

Diesel and hybrids both selling well in Texas, California

As we've already learned, 2013 was a pretty big year for diesel and hybrid sales. According to registration data, there are now 7 million diesel passenger vehicles and 2.8 million hybrids on the roads in the US. Diesel registrations grew by 410,040 last year, and hybrids increased by 531,385. From 2010 to 2013, diesel registrations increased by 30 percent, and hybrid sales grew by 64.5 percent. When compared to an overall market growth of just 3.7 percent, those numbers are remarkable. Diesel Te

152Want To Save Thousands On Your Next Car? Buy A Diesel

You can reap big long-term ownership savings by getting one of these efficient vehicles

Diesel vehicles typically save $2,000 to $6,000 in total ownership costs over three to five years when compared to similar gasoline models.

6MIT figures out how to clean diesel trucks with RF signals [UPDATE]

People rightfully dislike wireless signals being transmitted from the person behind the wheel when they text while drive, but there are times when a car's wireless signals can be good news. Researchers at the Massachusetts Institute of Technology (MIT) have found a way to use wireless signals under the hood to help cut pollution from heavy-duty vehicles such as diesel-powered trucks. That's something we can get behind.

26UN says diesel trucks might not be worst emission offenders

Airborne particulate matter can really do a number on us humans, particularly with regard to our cardiovascular systems. It seems reasonable for air pollution, then, to be a major concern when calculating the environmental and health costs of the way we do business. Diesel-powered transport has come under particularly scrutiny and particulate matter from diesel exhaust has been widely blamed for diseases such as lung cancer in humans. Perhaps, though, commercial diesel has gotten too tough of a

5Future Polestar Volvo models could feature diesel, EV tech

Volvo's Polestar sub-brand has made the transition nicely from being the company's racing arm to building some seriously cool, Swedish cars. Now that it has a few models under its belt, it plans to grow larger and greener. The next-generation of Polestar-tuned vehicles are rumored to include high-performance hybrid and diesel powertrains.

461947 Chevy rat rod pickup leaves rubber and smoke in its wake

Cool comes in multiple flavors. One one hand, we have the sophisticated attraction of svelte design and the efficient use of power. Of course, on the other hand there is the allure of being the bad boy and going against the grain. That is part of the appeal of rat rods. Ideally, they are built without rules to an owner's specific tastes, and this widened and heavily modified 1947 Chevrolet pickup rod is a perfect example of that spirit.

56Anti-EV, pro-hybrid ad from Lexus gets a whole lot wrong

Tell us if you're surprised that Toyota (through its Lexus brand) is putting out some questionable information about electric vehicles. While it's one thing for company executives to be anti-EV, it's quite another to put out obviously false information when you speak ill of plug-in vehicles, especially when you also sell them. The automaker offers the RAV4 EV and Prius Plug-In, albeit in limited numbers,

13EPA's $9M clean diesel campaign could pay back $117M in health benefits

Diesel fumes are bad for people. But diesel power is good for a lot of heavy-duty work. So, for now, one answer to threading the needle of that little conundrum is to make diesel engines as clean as possible. To that end, the US Environmental Protection Agency (EPA) has announced $9 million worth of grant funds from the DERA National Funding Assistance Program. If the EPA's numbers are correct, that money could be worth something like $117 million in public health benefits.

39Trident Iceni stakes claim to world's fastest diesel sports car, will come to US

It was back in 2006 when we first came across Trident and its plans to create a diesel-powered sports car. The prototype was up and running a couple of years later, and it debuted at the Salon Privé in London a few years after that. It's now been the better part of two years since its debut – and eight years since the project first surfaced – but Trident Sports Cars says it's finally ready to launch the vehicle it called Iceni.

17High-tech observatory only uses decades-old diesel trucks

Head on out to Green Bank, WV, and you're likely to notice what looks like a giant satellite dish on the horizon. Only it's not a satellite dish. It's actually a fully steerable radio telescope – the largest of its kind in the world. It's funded by the federal government through the US National Science Foundation and operated by National Radio Astronomy Observatory. In short, it's one of the most advanced telecommunications devices in the world. So you'd expect them to service it with suit

67VW may not bring diesel Golf GTD to US after all

There is some bad news for hot hatch fans who also love efficiency. The chances of the Volkswagen Golf GTD coming to the US are increasingly slim, according to an interview with Volkswagen Group of America CEO Michael Horn in Automotive News. Horn says that the model would cost too much to import from Germany. Cue the sad trombone.

282015 Volkswagen Jetta is new, we promise

Look closely, kids – you're staring at the face of a refreshed Volkswagen Jetta. Yeah, it's hard to tell, what with the only noticeable changes consisting of slightly updated headlamps and taillamps, and some other aerodynamic tweaks. But the big news for the 2015 Jetta is what you can't see.

4BMW bringing X3 diesel, X5 PHEV concept to New York

We've seen the i3 and i8 plug-in vehicles at plenty of BMW auto show stands these past few years. At the upcoming New York International Auto Show, the automaker will spread out a bit by showing off both new diesel and plug-in hybrid SUVs. Bimmer will showcase its diesel-powered X3 vehicle, which starts sales this spring as a 2015 model, and a concept plug-in hybrid X5 SUV.

32Mitsubishi Outlander PHEV arrives in UK with 'no' price premium

For UK buyers who are interested in a plug-in hybrid SUV, the Mitsubishi Outlander PHEV just got a little bit sweeter. The reason is that the base model of the vehicle will be available with or without a plug for the same price at the base diesel model.

75Modern diesels pollute over 20% less than those from 10 years ago

Today, if you're a car company and you offer a diesel engine in this market, you have to go to great lengths to show consumers that it's less harmful to the environment than a gas-powered engine. That's why marketing types have come up with TDI Clean Diesel and EcoDiesel and BlueTec and so on, rather than just plain old "diesel." How much cleaner are today's oil burners, though?

6Porsche 911 with VW turbodiesel prepares for LeMons assault

LeMons racing is a wonderful example that setting limits can actually breed creativity. The series mandates that all entries must cost $500, not counting safety equipment, and that cap forces teams to be ingenious in how they build a racecar. Take for example this diesel-powered Porsche 911, which its creators have dubbed Ferkel the Nein-11, that will be racing in the Sears Pointless race this weekend in Sonoma, California.

69Ram/Jeep Ecodiesel engine has Maserati roots

The 3.0L turbodiesel V6 in the 2014 Ram 1500 EcoDiesel earned a slot on Ward's Automotive 2014 10 Best Engines for its power, fuel economy and refinement. In a piece looking at how Fiat subsidiary VM Motor developed the engine, Ward's also makes note of the fact that the same lump goes in diesel versions of the Maserati Quattroporte and Ghibli. They're tuned a bit differently, naturally, with the QP putting out 275 horsepower and 442 pound-feet of torque, the smaller, lighter Ghibli making do wi

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