1971 Chevelle Malibu on 2040-cars

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This map reveals the cleanest vehicles based on location

Naysayers love to point out how dirty the electricity grid mix is when it comes to charging electric vehicles. Curmudgeons are eager to jump into any conversation about EVs to enlighten the lucky listeners about how plug-in cars contribute to pollution, sometimes even throwing in a dash of climate-change denial for good measure. (Thanks, buddy. Pray, tell me more about the plight of oppressed SUV owners.) Unless someone buys an EV just because they think they're cool (which, yeah, they often are), they probably have at least a passable understanding of their environmental pros and cons. As many EV owners are already aware, location has a lot to do with any particular plug-in car's carbon footprint. Still, there's always more to know, and knowledge is not a bad thing, especially if one uses it to do the right thing. That's why this handy-dandy map from Carnegie Mellon University is so interesting. CMU researchers have compiled information about the lifecycle greenhouse gas emissions of various EVs based on where they're charged, as compared to gasoline-powered vehicles. The researchers looked at the Nissan Leaf, Chevrolet Volt, and Prius Plug-In Hybrid versus the gasoline-dependent Toyota Prius hybrid and the stop-start-equipped Mazda3 with i-ELOOP and compared grams of CO2 emitted per mile. CMU takes into account the grid mix, ambient temperature, and driving patterns. CMU takes into account the grid mix based on county, as well as ambient temperature and driving patterns in terms of miles traveled on the highway or in the city. For instance, if you drive a Nissan Leaf in urban areas of California, Texas, or Florida, your carbon footprint is lower than it would be if you were driving a standard Toyota Prius. However, if you charge your Leaf in the Midwest or the South, for the most part, you've got a larger carbon footprint than the Prius. If you live in the rural Midwest, you'd probably even be better off driving a Mazda3. Throughout the country, the Chevrolet Volt has a larger carbon footprint than the Toyota Prius, but a smaller one than the Mazda3 in a lot of urban counties in the US. The Prius and Prius Plug-In are relatively equal across the US. Having trouble keeping it straight? That's not surprising. The comparisons between plug-in and gasoline vehicles are much more nuanced than the loudest voices usually let on.

GM Recalls 218,000 Chevy Aveo Models Over Fire-Prone Lighting

The recall train keeps on rolling for General Motors. Hot on the heels of its recent 2.4 million-vehicle recall of various models, it's now calling in 218,000 Chevrolet Aveo units from the 2004-2008 model years because they could catch fire. The problem concerns the daytime running light module in the instrument panel. It could overheat, melt and cause a fire. According to GM spokesperson Alan Adler, "We are aware of some fires," and the company "is still investigating." Adler wouldn't comment about how many fires were reported or when the automaker was first aware of this issue because of the ongoing analysis. However, he said the issue has not caused any injuries or fatalities. GM also doesn't have a fix for the problem with the DRL module yet. The company says in its recall statement to the National Highway Traffic Safety Administration that the remedy "is still under development." Adler wasn't sure when it would be ready, but he said Aveo owners would receive notification in the mail "relatively soon." They will receive a second letter later to schedule the repair. In a separate letter about the Aveo's problem to NHTSA (viewable here as a PDF), GM said its Executive Field Action Decision Committee decided to conduct the recall on May 16. Scroll down for the recall report. RECALL Subject : Daytime Running Light Module Overheating Report Receipt Date: MAY 19, 2014 NHTSA Campaign Number: 14V261000 Component(s): Potential Number of Units Affected: 218,000 Manufacturer: General Motors LLC SUMMARY: General Motors is recalling certain model year 2004-2008 Chevrolet Aveo vehicles equipped with daytime running lights (DRL). In the affected vehicles, there may be heat generated within the DRL module located in the center console in the instrument panel, which could melt the DRL module. CONSEQUENCE: If the DRL module melts due to the heat generation, it could cause a vehicle fire. REMEDY: The remedy for this recall campaign is still under development. The manufacturer has not yet provided a notification schedule. Owners may contact General Motors customer service at 1-800-222-1020 (Chevrolet). General Motors recall number for this campaign is 14236. NOTES: Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.

Chevy's 6.6-liter Duramax is pretty much all new

To say there's a heated battle in heavy-duty pickups is an understatement, with Chevrolet, Ford, and Ram constantly trading blows of increased torque, horsepower, and towing capacity. The latest salvo is the revised, more powerful turbo diesel 6.6-liter Duramax V8 in the 2017 Chevy Silverado. It has 910 pound-feet of torque, an increase of 145, putting it nearly level with the Ford Super Duty. Here's a closer look at where those gains come from. How exactly did Chevrolet add all that torque plus 48 horsepower? The automaker essentially took a fine-tooth comb to the entire engine. Chevy says it changed 90 percent of the V8, and the cumulative effect of those small changes adds up to big increases. As you might guess, the turbocharger is updated. The larger unit features electric actuation of the variable nozzle turbine (VNT), and what Chevy calls a double axle cartridge mechanism that separates the VNT moving parts from the housing. That helps with heat performance as well, with a claim that the exhaust side of the turbo can run continuously up to 1,436 degrees Fahrenheit. Helping that cause are six exhaust gaskets made of Inconel - an nickel alloy that contains chromium and iron – and upgraded stainless steel for the exhaust manifold. Despite having the same cast iron cylinder block, albeit with some minor enhancements, the engine has new cylinder heads, pistons, piston pins, connecting rods, and crankshaft, which have all been upgraded to handle 20 percent higher cylinder pressures. Alongside the increase in pressure, Chevrolet also increased the cylinder head's structure with a honeycomb design. The pattern features high-strength aluminum with dual layer water jackets that not only improve strength, but also optimize water flow for better cooling. For 2017, the cylinder head also benefits from integrated plenum that aids the engine in getting more air under heavy loads. The cylinder head isn't the only component to get a minor update, as the pistons have a larger diameter pin for improved oil flow. The same detailed improvements has been bestowed to the humble connecting rods (second in our hearts only to the inanimate carbon rod). The new design has the bolts oriented roughly 45-degrees to the rod instead of parallel. The angle split design, as it's called allows for easier passage through the cylinder.