2006 Mazda Mx-5 Miata on 2040-cars

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Watch a high-speed chase from a motorcycle-mounted officer's point of view

Riding a motorcycle through high traffic can be a stressful experience. And we don't even want to imagine what it's like to have to actually pursue someone on a motorcycle. Fortunately, we don't have to. Officer Troy Gurley of the Florence, Alabama police force recently attempted to stop a vehicle for traffic violations. The driver, 24-year-old Justin Sanders, figured he could use his Mazda3 to outrun the bike cop. Turns out, not so much.
Gurley pursued Sanders for nearly five minutes as the Mazda driver ran stop signs, swerved through traffic and raced through residential neighborhoods, but the perpetrator couldn't shake the tenacious and experienced rider. Other units soon joined the pursuit, and Sanders thought it best to leave the protection of his car to attempt to flee on foot. From there, it didn't take officers long to apprehend him. You can watch the video below for yourself.

From Maseratis to rental cars | Autoblog Podcast #511

On this week's podcast, Mike Austin and David Gluckman are in a huddle room (again), because the studio was already taken (again). We talk about the all-wheel-drive Dodge Challenger GT (again), as well as the Jeep Wrangler, Maserati Levante, Miata RF (again), and then David waxes poetic on mediocre rental cars (or similar). The episode wraps up with the traditional doling out of Spend My Money buying advice, with some input from an S2000 owner on advice discussed last time. The rundown is below. Remember, if you have a car-related question you'd like us to answer or you want buying advice of your very own, send a message or a voice memo to podcast at autoblog dot com. (If you record audio of a question with your phone and get it to us, you could hear your very own voice on the podcast. Neat, right?) And if you have other questions or comments, please send those too. Autoblog Podcast #511 Topics and stories we mention Dodge Challenger GT Jeep Wrangler Unlimited Maserati Levante Mazda MX-5 Miata RF Used cars! Rundown Intro - 00:00 What we're driving - 06:11 Spend My Money - 32:45 Total Duration: 55:30 Get The Podcast iTunes – Subscribe to the Autoblog Podcast in iTunes RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Feedback Email – Podcast at Autoblog dot com Review the show on iTunes Podcasts Dodge Jeep Maserati Mazda Nissan mazda mx-5 rf dodge challenger gt

Mazda Skyactiv-X Review | The revolution begins with a squeeze-bang

The matte black Skyactiv-X prototype looks like a rough Mazda3, perhaps reconstructed after a bad wreck by an over-enthusiastic owner of a spot welder and lots of gaffers' tape. Ribbed ducts poke out of the dash sending two breaths of conditioned air to no one in particular. Even its revolutionary engine, the thing we're here to experience, is entombed in a massive, nondescript cover to mask its unseemly noises. It's a wild, strange way to meet a very unconventional vehicle that promises diesel-like fuel economy, a wide torque band, and an exotic method for burning less gas than ever before. It takes a few hours for Mazda's engineers to explain the fundamental principles of operation. For more detail, read our Skyactiv-X Spark Controlled Compression Ignition explainer, but here's a very brief overview. Skyactiv-X marries some traditional gasoline engine characteristics with a novel form of compression ignition called SPCCI. The key for Skyactiv-X is to use very high compression in the cylinder and an extremely lean fuel-air mixture. Squeezed right to the cusp of getting hot enough to blow up all on its own (which is very hard to predict), a squirt of extra gas and a spark interject to cross that compression-ignition threshold in a controlled and predictable manner. See the animation below: That takes a few essential components to get just right. One is a massive amount of computer processing power and some pressure sensors in the individual cylinders, because the ambient conditions change how and when these things happen. Skyactiv-X uses a clutched supercharger to pump in additional air when needed to nail the mixture precisely, and high-pressure injectors to get the low ratios of fuel to disperse properly in the chamber. And since it operates like a conventional gasoline engine sometimes, it uses valve timing to lower the very high compression ratio so it doesn't reach combustion ignition in that mode. In practice, the Skyactiv-X runs in compression ignition mode most of the time. In practical terms, that means it drives like a torquey gasoline Skyactiv engine. The torque curve is broad and flat — diesel-like in that respect. That also means it can get away with using a six-speed transmission and a lower final drive for better response. There's enough grunt and economy together that Mazda can let the engine spin faster — at 60 mph, it's running at roughly 1,000 more RPM than a similar gas engine, with greater efficiency.