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GM diesel pickups first to undergo extra EPA, CARB testing

The effects of Volkswagen's long-running diesel emissions evasion are starting to spill over to other automakers, but General Motors is taking things in stride. The 2.8-liter, four-cylinder Duramax in the 2016 Chevrolet Colorado and GMC Canyon is the first engine to get extra scrutiny by the Environmental Protection Agency and the California Air Resources Board, Automotive News reports. Rather than just the usual in-lab test, it's also being checked on the road. However, the extra evaluation shouldn't have any impact on when the trucks with his mill hit dealers later this fall. "We're in our final stages of the EPA certification, and our launch is on track," Chevy spokesperson Otie McKinley tells Autoblog. The four-cylinder diesel in the trucks makes 181 horsepower and 369 pound-feet of torque, and the automaker is touting low NOx production. In the announcement for the Colorado's specs, the company calls it "the cleanest diesel truck engine ever produced by General Motors." The tech includes exhaust gas recirculation to lower combustion temperatures and improve emissions. There's also a urea tank like on the bigger diesels for full-size trucks, and it gets refilled in time with oil changes. An indication on the instrument panel lets drivers know when that's needed, too. Even with the more demanding testing, the company doesn't seem too worried about the four-cylinder passing. "Part of our development process is on-road and off-road [laboratory] testing," Scott Yackley, Chevy Trucks assistant chief engineer, said to Automotive News. In the wake of the VW scandal, the EPA has pledged more rigorous testing. Before, on-road emissions evaluations were largely limited to heavy-duty vehicles, but the agency has decided to apply the checks more often to other models. There's also now greater cooperation with Canadian authorities.

Did the Chevy Corvette Z06 break 7 minutes at the Ring? Not likely

"Just because it's on the internet doesn't make it true." That's rule number one, two and arguably, three, of surfing the world wide web. In today's example of this rule, we have the following. The website HorsepowerKings is claiming that a 2015 Chevrolet Corvette Z06, with the eight-speed automatic and Z07 package, managed to lap the Nurburgring Nordschleife in under seven minutes. To put that in perspective, that super-quick time would put the 650-horsepower, $97,000 (the price of a 2LZ with the Z07/8AT combo) Z06 a mere two seconds slower around the world's most challenging race track than the $929,000, 887-horsepower Porsche 918 Spyder Weissach. It's about eight seconds quicker than Nissan's own test of the GT-R Nismo Track Pack and 13 seconds faster than a Dodge Viper ACR. Unfortunately, Chevy says there isn't anything to it. We reached out to the Bowtie's Monte Doran, who confirmed that HK's claims are "not accurate." "Any one – a manufacturer, a journalist, a guy standing on the fence of the Ring – can claim a lap time. As such, we think the in-car video is essential to proving a time is real and credible, and Chevrolet will not release a lap until we have a video to substantiate the claim," Doran told Autoblog. "Chevrolet accumulated nearly 1,000 miles of testing on the Nurburgring with the Z06. During that time, we only had two opportunities to run a lap on video – and both were rained out. If we get a lap on video, we will post an official time." Doran finished by referencing the "only official lap time" for the Z06 – a 2:41 around the Virginia International Raceway. Frankly, we aren't terribly surprised by Chevy's position. One would imagine if the Z06 were matching million-dollar hypercars around the 'Ring, the company would literally be screaming about it from Renaissance Center's rooftop. As this is quite the opposite of that, though, we're betting that the real Z06 lap time - while still likely very, very fast – won't be quite quick enough to frighten the brightest and best of today's hypercars.

2020 Chevy Corvette Stingray vs the world: How it compares on paper

The 2020 Chevy Corvette Stingray in its base form offers an astonishing amount of performance for the money. In fact, so impressive is the car's spec sheet that the Corvette kind of exists in two different competitive sets: one of cars priced similarly, and another with cars of similar performance and reputation. To get a feel for how it handles each of these segments, we've compiled specifications for those two sets of players. You can find the first set below, which looks at cars of roughly the same price point. Following that is a bit of analysis, and then there's a chart of cars with similar performance and reputation. And that chart will also have some analysis. Though final pricing for the Corvette hasn't been announced yet, we know the Corvette will start at less than $60,000. And as far as pricing goes, its closest competitor is the Porsche 718 Cayman, which also starts at just under $60,000. Both are mid-engined and rear-drive, but the Corvette offers an extra 195 horsepower and 190 pound-feet of torque. The Cayman does boast a curb weight of right around 3,000 pounds, so it weighs a few hundred pounds less than the Corvette, but it's likely not enough to make up for the power deficit. The Corvette's sub-3.0-second 0-60 time bears this out against the Cayman's best 4.5-second run. Impressively, though, the Cayman has more cargo space than the Corvette in a package that's nearly 10 inches shorter. The Cayman also still offers a manual option for those that prefer self-shifting. The 2020 Toyota Supra is on the cheap end of this sports car class, just crossing $50,000. It also boasts more power than the Cayman, though it's still down by 160 ponies and 105 pound-feet of torque to the C8. It's also about as roomy as the Corvette, despite being about the same size as the Cayman. Cargo space is a bit tighter. Its driving characteristics will likely differ, too as the Supra sits on a front-engine platform. It might even feel closer to a C7 Corvette in some ways. The other mid-engine entry in this price range is the 2019 Alfa Romeo 4C Spider. Its small 1.7-liter turbo inline-4 only makes 237 horsepower and 258 pound-feet of torque, but it's also far and away the lightest of this group at 2,487 pounds. That's roughly 1,000 pounds lighter than the Corvette. It isn't as fast as the Corvette in a straight line, but that lightness surely pays dividends in cornering and braking.