1991 Nissan 300zx on 2040-cars

Auto blog

Japan plans real-world diesel emissions test after companies fail

Japan's transport ministry plans to start real-world diesel emissions tests after an experiment found four models from Toyota, Nissan, and Mitsubishi that produced more nitrogen oxide (NOx) emissions than the nation's rules allow, according to The Japan Times. Regulators there usually only perform emissions checks in the lab. The VW diesel scandal has everyone double-checking their figures. Diesel versions of the Toyota Hiace van, Land Cruiser Prado, and Nissan X-Trail produced up to 10 times more NOx than allowed. The Mitsubishi Delica D:5 was up to five times over the limit, The Wall Street Journal reports. There was no evidence of defeat devices in the vehicles. Mazda performed well in the experiment, though. The CX-5 passed with nearly the same results on the road and in the lab. The Demio, better known as the Mazda2, did nearly as well with only slighter higher figures in the real world than in the controlled setting. The experimenters theorized the reason for the excessive emissions was that cold weather caused the engines' software to shut off the exhaust gas recirculation to prevent damage, according to the WSJ. However, this behavior also increased NOx production. Toyota, Nissan, and Mitsubishi don't have to worry about punishment from the transport ministry because this check was just an experiment. Their models already passed the mandated lab tests, which was the only requirement, according to The Japan Times. As governments begin greater real-world emissions tests, the results suggests diesels aren't very clean. A recent check in France found models from Ford, Renault, and Mercedes-Benz that didn't perform up to the standards. Regulators in India conducted similar evaluations and ordered VW to recall over 300,000 vehicles. Related Video:

Nissan's Cummins tie-up bears first fruit with Frontier Diesel Runner concept

The 2014 Chicago Auto Show is proving to be a surprisingly big show for alternative fuels. The Chevrolet Silverado HD pickups are getting a compressed natural gas option and the refreshed BMW X3 is receiving a diesel engine, as is the German automaker's 7 Series. You can add one more oil burner to the mix, at least in concept form: Nissan has released its Frontier Diesel Runner Powered by Cummins with a 2.8-liter, four-cylinder turbodiesel engine and an eight-speed automatic transmission from ZF.
While Nissan calls the Cummins-powered Frontier a concept, it's really just a Frontier DesertRunner 4x2 with a diesel engine replacing the standard 4.0-liter V6, and it's meant to gauge consumer interest for a diesel option in the next-generation Frontier. Nissan has clearly noticed that Chevrolet will be offering a diesel in its new Colorado and wants to see how buyers will react to a mid-size alt-fuel pickup from a Japanese brand.
Exterior modifications to the concept are minor. To show off the engine, there is a transparent hood insert and the pickup has been painted in a two-tone finish of high-gloss red and matte silver edged in carbon fiber trim. The interior gets the same combo of red, silver and carbon fiber to match the outside.

AAA ranks Tesla Model S P85D best green car of 2015, Versa is best value

Reviewers from all parts of the automotive world just seem to love the Tesla Model S, whether it's the pragmatists at Consumer Reports or the enthusiasts at Car and Driver. You can add one more to that list because the 2015 P85D grabs the top spot in AAA's fifth annual Green Car Guide, after Tesla's win last year too. The organization's ranking of 88 green models also names the 2014 Nissan Versa SV as the best value in the segment. To take the victory, the P85D had to score the most points over 13 categories, including emissions, acceleration and cargo capacity, and it won handily with 94.87 points. There was nearly a tie for second place, though. The 2015 Volkswagen e-Golf SEL Premium scored 85.5 points, and the 2014 BMW i3 narrowly came in third with 85.4. The best value award is based on the as-tested price per point scored. So while the Versa SV only had 64.5 points overall, its low price meant that each one cost just $249. Second place went to the Versa Note SV with 64.63 points at $260 each, and third was the Hyundai Accent GLS with 61.1 points for $269 each. Keep in mind, AAA's ranking doesn't attempt to find the most environmentally friendly vehicle, rather it tests the green car segment to give recommendations to buyers. Battery electric powertrains, compressed natural gas, clean diesel, hybrids, partial zero-emissions vehicles, and simply models with high fuel economy are all counted by the organization. The results are published in a 160-page magazine, which you can read here. It also offers suggestions on economical driving and explains some of the fuel-saving tech currently available. Related Video: Top Green Vehicle is a 2015 Tesla, According to Fifth Annual AAA Green Car Guide ORLANDO, Fla., April 20, 2015 The 2015 Tesla Model S P85D earned the top score in the 2015 AAA Green Car Guide, the motor club announced today. The Palo Alto-based automaker's car is featured with more than 80 other green vehicles in the 2015 AAA Green Car Guide. The best green car value award went to the 2014 Nissan Versa SV. To help those in the market for a green car or truck, the 160-page, comprehensive fifth annual AAA guide reviews 88 battery electric vehicles, compressed natural gas-powered (CNG) vehicles, clean diesels, hybrids, partial zero emission vehicles (PZEVs), and vehicles with high fuel economy.