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Five vehicles named Top Safety Pick+ including new Civic, MKZ

In an attempt to help push vehicle safety to a higher level, the Insurance Institute for Highway Safety created a stricter Top Safety Pick+ rating last year, which incorporates a brutal small overlap test and requires cars to get Good ratings in four out of the five categories (and no less than Acceptable in the fifth). Joining the list of the safest cars of 2013, the 2013 Volvo XC60, Lincoln MKZ, Honda Civic (sedan and coupe) and the 2014 Mazda6 have all received the coveted TSP+ rating.
The Mazda6 and Lincoln MKZ have both been completely redesigned, and both received Acceptable ratings in the small overlap test. The Honda Civic, coming off its emergency refresh for 2013, is the first small car to be subjected to the small overlap test, and IIHS says that one of the car's many upgrades includes a stiffer front structure allowing it to receive Good ratings in all categories. Similarly, the XC60 gets all Good ratings thanks to, according to IIHS, Volvo updating the airbag software allowing the side airbags to inflate during the small overlap test.
The 2014 Subaru Forester has not yet been subjected to the small overlap test, so it must make do with just a Top Safety Pick rating until the IIHS tests small utility vehicles, which is expected to happen later in the spring.

44 Miatas engaged to spell happiness from above

We've seen all manner of ways to propose marriage, from the usual candlelit dinner to the Jumbotron at the big game. A friend of ours recently proposed with his a barbershop quartet singing backup. But this has to be a new one - and one that automotive enthusiasts would probably find even more touching than a sky-writing biplane.
A member of the Miata.net forum recently asked other MX-5 enthusiasts to help him pop the big question to his bride-to-be. He got 31 Miatas together and needed just four more, but after appealing to his fellow roadster fans, over 40 turned up in the parking lot at the local high school.
The groom-to-be runs an aerial photography business and used an unmanned drone which his girlfriend thought would be shooting some local real estate properties when it flew over the parking lot and captured the image you see above with 44 little roadsters spelling out "Marry Me?" The answer, in case you were wondering, was a resounding "Yes!" How could she not, after all, when those Mazda convertibles are just so darn adorable? Now they'll just need to figure out what they'll be driving to the chapel on the big day.

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.