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2014 Mazda6 recalled due to fuel overfill fire risk

Mazda is recalling 19,000 Mazda6 sedans from model year 2014, over concerns that the fuel tanks can be filled up too much. What is it with Mazda and fuel tanks?
The big concern is, obviously, spillage when filling up. There's also a risk that a radical temperature swing could cause the fuel volume to expand, causing a full tank to spill over without the driver knowing about it. According to the National Highway Traffic Safety Administration bulletin, if the fuel spills over, it could end up in something called the charcoal canister, which helps with the car's emissions. If it fills up the canister, it could leak out onto the road. None of this is really desirable.
The affected vehicles were all built between October 25, 2012 and May 9, 2013. It's unclear if there have been any fires due to this problem. Dealers should have been notified by now, while owners should begin receiving official recall notifications very soon.

How Mazda got Skyactiv-X to work is incredible

"Take everything you know about engines and turn it around," Mazda North America Vehicle Development Engineer Dave Coleman says, patiently and with a look of benevolent pity, as he's quizzed about the particulars of the company's new engine. The Skyactiv-X engine is enigmatic — and deceptively simple in operation. And the bottom line for American consumers is that they'll be able to buy a car (or crossover; we don't know yet what vehicle will first get it) by late 2019 that provides diesel-like fuel economy but runs on regular old gasoline. In between diesel and spark ignition, but it's neither To truly understand it, you have to dive into the contradictions. Take that regular old gasoline: Contrary to common sense, the lower the octane, the better it works. In the lab, the Skyactiv-X engine loves 80 octane. The lowest Americans get is 87, so the engine is tuned for that octane. Go higher and you lose some low-end torque. Coleman was right. It's hard to wrap your head around an engine that thrives just at the point when most gas engines would aggressively self-destruct. It uses a supercharger to pump additional air — but not additional fuel. It uses spark plugs to start a combustion cycle that normally doesn't need a spark. And, quixotically, it's not displacing Mazda's own American-market diesel engine, currently languishing in a seemingly endless hell of regulatory approval. More bizarre: Mazda is a tiny automaker facing real existential headwinds, and gasoline compression ignition is a massive challenge. GM and Hyundai announced compression ignition, or HCCI, projects (full name, homogeneous charge compression ignition) to great fanfare, but they never amounted to a production hill of beans, crippled by reliability issues or horrible vibrations. Worse, they only worked at an unusably narrow range — low RPMs and low loads. HCCI research improved direct-injection gas and diesel engine technologies for these companies, but HCCI itself remains untamed. The benefits of lean combustion Why even try to tame HCCI? The answer is much better fuel economy and lower emissions. Less burned carbon-based fuel, less carbon dioxide released. That's simple. But there are some thermodynamic reasons for the lean combustion you can achieve with compression ignition that are worth explaining. The ideal amount of fuel for a conventional engine to burn is about a 14:1 air-to-fuel ratio. That lets every molecule burn nicely, in theory.

2018 Mazda6 gets more power, efficiency to go with updated looks

The 2018 Mazda Mazda6 will debut at the L.A. Auto Show later this month, and the company released teaser images of the exterior and interior Wednesday – both of which tell us a lot about the new car. Mazda also said the sedan will have more efficient and more powerful engines. Starting with the visuals, the car doesn't look extraordinarily different from the current model, but there are notable changes. Up front, the Mazda6 now has a deeper-set grille with a 3D mesh instead of slats. The chrome strip that wraps around the lower part of the grille extends across the width of the headlights, too. Both of these cues are pulled from the Mazda CX-5. From what we can tell in the image, it looks like most of the sheetmetal along the sides and top are roughly the same as the current model. The interior also isn't a major departure from the current car, but the changes do make it cleaner and more elegant. All of the air vents sit along one slender plane that stretches across the interior. It leaves the top of the dash uncluttered and makes the vents look like a more integrated part of the design. Below the vent strip is another line of what appears to be vinyl or leather trim, and below that are the climate controls. The updated looks are accompanied by significant mechanical upgrades. While the current model offers just one engine, a naturally aspirated 2.5-liter four-cylinder, the new car will have two options. The first is again a naturally aspirated 2.5-liter engine, but it now has cylinder deactivation, allowing it to run on just two cylinders at times. For those who prefer power to efficiency, the Mazda6 will also be available with the turbocharged 2.5-liter four-cylinder from the CX-9 crossover. In that application, it makes 250 horsepower and 310 pound-feet of torque. The full reveal of the car happens on November 29 at the L.A. Auto Show. Be sure to check back then for more photos of and details about the car. Related Video: Image Credit: Mazda LA Auto Show Mazda Sedan