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Mazda3 Skyactiv-Hybrid and CNG Concept shown in Japan

Mazda has received a tremendous amount of public and industry praise in the last few years, following up the successful introduction of its Skyactiv technology (powertrain and otherwise), with strong products like CX-5, Mazda6 and most recently, the Mazda3. At the Tokyo Motor Show, Mazda has taken yet another step forward with Skyactiv and the 3, showing the compact (called "Axela" in Japan) with an all-new compressed natural gas engine in the Skyactiv-CNG Concept.
The end result of the Skyactiv-Hybrid is fuel consumption estimated at something like 74 miles per gallon.
Mazda thinks that CNG-powered vehicles are due for an uptick in demand, and the company believes this new powertrain will add valuable breadth to the Mazda3 range. The CNG Concept is actually a duel-fuel vehicle, capable of running on either natural gas or gasoline. In fact, we're told that the high compression ratio (14:1) inherent in Skyactiv-technology gasoline engines makes conversion to CNG particularly simple.

2019 Subaru Forester vs compact SUV rivals: How they compare on paper

We've seen what the 2019 Subaru Forester looks like (pretty much the same). We've found out how much it's going to cost (just a bit more). And also how much bigger and more powerful it'll be (appreciably on both counts). Now it's time to see how all of that compares to its top compact SUV rivals. While you can see the same engine and dimension specs for every compact SUV here, for this comparison featuring the latest 2019 Forester info, we've decided to define "top rivals" as those that the 2018 model was most frequently cross-shopped with. That means the 2018 Honda CR-V, 2018 Toyota RAV4, 2018 Mazda CX-5 and 2018 Nissan Rogue. At the time of this writing, none of their respective manufacturers had released data for 2019 models. We also included info for the 2018 Forester as well. So, without further blather, cue the Spreadsheet-o-Matic 3000. How big are they? The 2019 Forester may look nearly identical to the compact crossover it replaces, but it's nevertheless bigger and heavier. In particular, its wheelbase has increased from being the smallest in the segment to one that's pretty much average. It's a good bet that this gain is the reason rear seat legroom has also increased. Width is also up, but the Forester actually remains the narrowest compact SUV. As for other noteworthy dimensions, the new Forester now has the most maximum cargo capacity of any compact SUV with 76.1 cubic feet. Now, it should be noted, that's without the panoramic sunroof that comes on all but the base model. With it, max capacity shrinks to 70.9 cu-ft. Two points about that. First, Subaru is the only company that calls out this difference, and all the others almost certainly are not measuring with a sunroof. Second, this gives you an idea about how much of "maximum cargo capacity" includes space up high where you're probably not storing much cargo. As such, we included the Forester's biggest number and think it fairly indicates Subaru should carry the "biggest in segment" crown. How do their engines and fuel economy compare? Here's the most important takeaway here: The new Forester is tied for the best fuel economy in the segment, but that's with standard all-wheel drive. Everything else listed above is with front-wheel drive. The 2019 model also gets a welcome injection of power, resulting in the fourth-most base horsepower in the segment (or fifth, if you consider the CR-V technically holds spots 1 and 3).

Asian automakers still reluctant to use more aluminum

There's a logical progression of technology in the auto industry. We've seen it with things like carbon-ceramic brakes, which use to be the sole domain of six-figure sports cars, where they often cost as much as an entry level Toyota Corolla. Now, you can get them on a BMW M3 (they're still pricey, at $8,150). Who knows, maybe in the next four a five years, they'll be available on something like a muscle car or hot hatchback. Aluminum has had a similar progression, although it's further along, moving from the realm of Audi and Jaguar luxury sedans to Ford's most important product, the F-150. With the stuff set to arrive in such a big way on the market, we should logically expect an all-aluminum Toyota Camry or Honda Accord soon, right? Um, wrong. Reuters has a great report on what's keeping Asian manufacturers away from aluminum, and it demonstrates yet another stark philosophical difference between automakers in the east and those in the west. Of course, there's a pricing argument at play. But it's more than just the cost of aluminum sheet (shown above) versus steel. Manufacturing an aluminum car requires extensive retooling of existing factories, not to mention new relationships with suppliers and other logistical and financial nightmares. Factor that in with what Reuters calls Asian automaker's preference towards "evolutionary upgrades," and the case for an all-aluminum Accord is a difficult one. Instead, manufacturers in the east are focusing on developing even stronger steel as a means of trimming fat, although analysts question how long that practice can continue. Jeff Wang, the automotive sales director for aluminum supplier Novelis, predicts that we'll see a bump in aluminum usage from Japanese and Korean brands in the next two to three years, and that it will be driven by an influx of aluminum-based vehicles from western automakers into China. Only time will tell if he's proven right. News Source: ReutersImage Credit: Sean Gallup / Getty Images Plants/Manufacturing Honda Hyundai Mazda Nissan Toyota Technology aluminum