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Mazda rolls out unlimited mileage warranty in Canada

Cold weather might be starting to grip parts of Canada, but our neighbors to the north are going to be able to drive their 2015 Mazda cars and utilities from Vancouver to Montreal with a little more peace of mind. That's because Mazda Canada is instituting an unlimited mileage warranty for its new models.
The updated plan starts with all 2015 model year vehicles (even those already sold), and the scheme simply removes that distance limit on everything but the emissions defect coverage. That means that the Mazdas have one year of service adjustments, three years of new vehicle coverage, five years on the powertrain, seven years against corrosion and three years of roadside assistance for as many kilometers as the owner drives.
The change removes at least one, tiny piece of anxiety about buying a new vehicle because it's easy to know when the coverage ends. "By offering our customers an Unlimited Mileage Warranty, we believe it will enhance their ownership experience by alleviating concerns such as kilometre limitations, repair costs and resale value," Kory Koreeda, president of Mazda Canada, in the automaker's announcement.

Top Gear recounts the fiery demise of the Mazda Furai

This past September we reported on Top Gear's destruction of the Mazda Furai, one of the finest concept cars to ever grace an auto show stage. It turns out that the Furai, which was burned nearly beyond recognition at the hands of the British magazine, was actually destroyed back in 2008, and that the entire thing had been covered up for five long years.
Now, a few months after publishing that heart-wrenching composite of a half-baked Furai (shown above), the lads at TG have published their account of just what resulted in a priceless concept car being transformed into a smoking hulk on a Suffolk runway. Click over to read the full story about just what happened, along with pictures of the Furai before, during and after the inferno.

Mazda files patents for a sequential twin-turbo setup

Mazda has a history of interesting engine technologies, from yesterday's rotary engine to tomorrow's compression ignition engine, and new patents show it still may have some internal combustion tricks up its sleeve. The one on display in these patents isn't especially new in concept, though. A sequential twin-turbocharger setup is something Mazda itself used on the third-generation RX-7. But it's something we haven't seen much of lately. It looks like it could have some possible advantages over older sequential systems, and it has some potential advantages for enthusiasts. First a quick and dirty primer for what makes a sequential twin-turbo system distinct from other twin-turbo systems. In many twin-turbo engines, there are simply two turbos that work together as one bigger turbo. They're the same size, and they spool up at the same time. With a sequential setup, at low rpm, a smaller turbocharger is spooled up first at low-rpm for quicker throttle response, and as the rpm and exhaust pressure increases, a valve opens up that allows a larger turbocharger to also spool up and provide high-rpm boost. That's basically how the Mazda design shown above functions. A big flap blocks off the larger turbocharger exhaust inlet, channeling all the exhaust to the smaller turbo. When more exhaust is available at high rpm, it looks like that flap opens up to spool up the big turbo, too. What's interesting here is that the way the turbochargers are packaged takes up less space than past systems. It looks like both turbos are contained in one unit that shares the same exhaust outlet, meaning the exhaust manifold could be kept simple and compact. In fact, the piping for compressed intake air could also be shared, reducing the amount of piping, which would further decrease the amount of materials and possible failure points. There are a number advantages of making this system smaller. The potential applications of the system are much greater, since it could fit in smaller cars with smaller engine bays. Making the system smaller also means that there won't be as much weight, which is important from both fuel economy and performance standpoints. Finally, the smaller setup likely uses fewer materials, which could make the system cheaper and thus easier to offer on a wider range of vehicles, or at least more profitable for Mazda.