1999 Mazda Miata on 2040-cars

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Mazda, Suzuki, Yamaha — more vehicle data fabrication found in Japan

TOKYO — Mazda, Suzuki and Yamaha improperly tested vehicles for fuel economy and emissions, the Japanese government said on Thursday, revealing fresh cases of compliance failures by manufacturers. The results came to light after the Japanese government had ordered the automakers to check their operations after revelations of improper testing at Subaru and Nissan last year. The conduct of automakers globally has come under intense scrutiny after Germany's Volkswagen AG admitted in 2015 to installing secret software in hundreds of thousands of U.S. diesel cars to cheat exhaust emissions tests, and that as many as 11 million vehicles could have similar software installed worldwide. In the Japanese cases, the carmakers have not broken any laws or prompted massive recalls. But a growing list of improprieties has tarnished the image of the country's manufacturing industry for high-quality products and efficiency. Suzuki, Mazda and Yamaha cleared vehicles for emissions or fuel efficiency even in cases where they were tested under invalid conditions, the ministry said in a statement. The errors related to slight deviations in the speed of the vehicles during testing that should have invalidated the test results. The automakers examined tests they had conducted over different periods of time, and in Suzuki's case they stretched back to 2012. None of the automakers found significant problems with actual emissions and fuel economy performance of the vehicles, which were destined for sale in Japan, and do not plan any recalls. Suzuki, Japan's fourth-largest automaker, said that of 12,819 sample vehicles tested for fuel economy and emissions since June 2012, around 50 percent of them had been inspected improperly. "I deeply apologize and will lead efforts to prevent recurrence," Suzuki Chief Executive Toshihiro Suzuki told a news conference. Mazda said there were irregularities in 4 percent of similar inspections on its cars, or just over 70 vehicles. In Yamaha's case, irregularities were found in 2 percent of inspections, or just a handful of vehicles. Both Mazda and Yamaha apologized. Suzuki and Yamaha shares fell 6 and 5 percent, respectively, and Mazda shares were down 1 percent, underperforming a steady benchmark Nikkei average. In July this year, Nissan admitted it had improperly measured exhaust emissions and fuel economy for 19 vehicle models sold in Japan.

Most reliable cars and trucks of 2022

Related: Least reliable cars and trucks of 2022   For years now, Consumer Reports has been one of the most prolific sources of vehicle reliability data around. The organization tests a number of vehicles each year and surveys its members on various automotive topics, including reliability. The results of its 2022 annual auto survey are in, and the list of most reliable vehicles has been revealed. Unsurprisingly, Toyota and Lexus dominated the list of most reliable vehicles, but BMW and Mini snuck into the top 10 as well. The list includes: Toyota Corolla Hybrid: 93 Lexus GX: 91 Mini Cooper: 89 Toyota Prius: 89 Mazda MX-5 Miata: 85 Lincoln Corsair: 82 Toyota Corolla: 81 Subaru Crosstrek: 80 BMW 3 Series: 80 Toyota Prius Prime: 77 In terms of the most reliable vehicle type, Consumer Reports says that sedans remain the best choice. Their average score is 58, which is notably better than SUVs’ average score of 51. Minivans and pickup trucks are lower, at 44 and 39, respectively. As Consumer Reports notes, many sedans are older models that have allowed their manufacturers to iron out the wrinkles, making them more reliable. Domestic automakers' SUVs and trucks performed better in the survey than their imported counterparts, with scores of 45 and 41, respectively. The study also showed that hybrids and plug-in hybrids are becoming more reliable, and have climbed the score ladder to the tops of their segments in many cases.  Consumer Reports says its study includes 17 trouble areas, including small stuff like creaks and rattles and much larger problems like drivetrain failures. The organization states that it weights each issue based on its severity to create its predicted reliability scores, with 100 being the best. A car must be in production for at least two model years to be considered for the list. Related video: Green BMW Lexus Lincoln Mazda MINI Subaru Toyota Car Buying Maintenance Ownership Convertible Coupe Crossover Hatchback SUV Hybrid Sedan Consumer Reports reliability

Watch what happens inside a rotary engine

Since it looks like Mazda may very well revive the Wankel rotary engine as a range extender for electric cars, there's no better time to become reacquainted with the quirky internal-combustion engine. And there's hardly a better way to become reacquainted than by peering into a running rotary engine, which you can do with the video above. The video comes to us from the YouTube channel Warped Perception. The channel has already shown what happens inside a conventional internal-combustion piston engine by putting a clear cylinder head on top of a flathead engine. This new video shows off the rotary engine by adding a clear side to a tiny model-airplane engine, something that we weren't aware existed and are glad to know about now. Despite the tiny size, the engine is functionally almost exactly like the bigger versions you'll find in Mazdas from about 1967 to 2012. It has intake and exhaust ports on the edges of the rotor housing, and the triangular rotor swings about in a peanut-shaped housing. For maximum effect, jump to right around the 7:40 timestamp. This is the point at which a bit of acetylene is added to the air-fuel mix for a brighter flame. It's at this point that you can really see when the mixture combusts and how the pressure of the flame pushes the rotor to produce rotational motion. Each stage of the video does slow things down to make everything as clear as possible. Even if you already knew how rotary engines worked, it's still fascinating to watch, first because it's something you don't get to see usually, and also because of the engine's elegant simplicity. Related Video: Image Credit: YouTube / Warped Perception Weird Car News Mazda Technology Videos rotary rotary engine