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Tougher than steel: Wood pulp could make lighter auto parts

KYOTO, Japan — The global push among carmakers to make ever lighter vehicles is leading some auto suppliers in Japan to turn to what seems like an unlikely steel substitute — wood pulp. Japanese researchers and auto component makers say a material made from wood pulp weighs just one-fifth of steel and can be five times stronger. The material - cellulose nanofibers — could become a viable alternative to steel in the decades ahead, they say, although it faces competition from carbon-based materials, and remains a long way from being commercially viable.> Related: Jay Leno drives the Renew cannabis car — hemp you can't dent Reducing the weight of a vehicle will be critical as manufacturers move to bring electric cars into the mainstream. Batteries are an expensive but vital component, so a reduction in car weight will mean fewer batteries will be needed to power the vehicle, saving on costs. "Lightweighting is a constant issue for us," said Masanori Matsushiro, a project manager overseeing body design at Toyota. "But we also have to resolve the issue of high manufacturing costs before we see an increased use of new, lighter-weight materials in mass-volume cars."A NEW PROCESS Researchers at Kyoto University and major parts suppliers such as Denso Corp, Toyota's biggest supplier, and DaikyoNishikawa Corp, are working with plastics incorporated with cellulose nanofibers — made by breaking down wood pulp fibers into several hundredths of a micron (one thousandth of a millimeter). Cellulose nanofibers have been used in a variety of products ranging from ink to transparent displays, but their potential use in cars has been enabled by the "Kyoto Process," under which chemically treated wood fibers are kneaded into plastics while simultaneously being broken down into nanofibers, slashing the cost of production to roughly one-fifth that of other processes. "This is the lowest-cost, highest-performance application for cellulose nanofibers, and that's why we're focusing on its use in auto and aircraft parts," Kyoto University Professor Hiroaki Yano, who is leading the research, told Reuters in an interview. The university, along with auto parts suppliers, are currently developing a prototype car using cellulose nanofiber-based parts to be completed in 2020.

Jay Leno celebrates Mazda Miata's 25th birthday

Ask a car enthusiast what the best driver's car on the road is, and the Mazda MX-5 Miata is very likely to come up rather quickly. Unjustly saddled with a reputation as a "chick's car," the Miata has been, over its three generations, one of the finest driving instruments ever built - it's light, agile and rear-wheel drive with direct, snappy steering, an engine that revels in being revved and a precise, smooth-shifting transmission. The fact that it's ridiculously affordable and reliable is simply a bonus.
It should come as no surprise then, that a car with these traits has endured for 25 years, a milestone reached only by some of the most famous nameplates in the auto industry - Corvette, Mustang, F-150, SL, M3 and so on. To celebrate its 25th anniversary, Jay Leno spent some time with the little roadster that could, while also chatting with two of the Mazda employees that were central to the MX-5's arrival on the world's automotive scene, Bob Hall and Tom Matano.
Take a look below for the latest video from Jay Leno's Garage on the excellent Mazda MX-5 Miata.

2019 Mazda CX-3 small crossover will start at $21,365

The figures are in for the 2019 Mazda CX-3 subcompact crossover, which will start at $21,365 when it arrives in showrooms later this month. That's $280 above the outgoing model, including a $975 destination and handling fee. Fuel economy figures are also now in from the EPA. When equipped with front-wheel drive, the 2019 CX-3 gets 29 miles per gallon in the city and 34 on the highway for a combined 31 mpg. The all-wheel-drive version is rated at 27 mpg in the city, 32 on the highway and 29 combined. Which are ... exactly the same figures as the outgoing version (so much for the promised fuel economy improvements). We detailed most of what's new about the 2019 version back in March at the New York Auto Show. Mostly, they're non-cosmetic changes: The carryover 2.0-liter Skyactiv four-cylinder picks up a couple more horsepower and pound-feet of torque for 148 total horsepower and 146 pound-feet of torque, joining a six-speed automatic transmission with manual-shift and sport modes. It also gets Mazda's G-Vectoring Control driving technology, a sportier, retuned suspension and improvements to make the driving experience quieter and more refined. Mazda says it's also added an electronic parking brake, which necessitated a redesign of the center console and armrest, adding storage space, and it redesigned the front seats and added a new rear armrest with built-in cupholders. Standard features include a new direct tire-pressure monitoring system and blind-spot monitoring with rear cross-traffic alert, two USB ports, a rearview camera, hands-free Bluetooth calling and audio pairing capability, and the 7-inch Mazda Connect full-color infotainment and diagnostic display, controllable via voice command or control knob. The new Sport i-ACTIVSENSE Package of safety technologies is available for an extra $1,100. It adds features including smart city braking support with pedestrian detection, lane departure warning, radar cruise control with stop-and-go function, LED headlights and LED combination tail lights. Other trim levels include Touring, which adds 18-inch wheels and keyless entry, and the top-level Grand Touring, which starts at $26,720 and $28,120 for front- and all-wheel-drive configurations, respectively. Grand Touring includes the Sport i-ACTIVSENSE Package, plus Parchment or black full-leather seating with high-gloss pleated piping and chrome accents on the front bumper and side sills, among other features.