1968 Chevrolet Camaro Ss on 2040-cars

Auto blog

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.

Nissan sells 3,117 Leaf EVs in May, climbs over 3,000 for first time ever

Chalk up a big win for the Nissan Leaf. In May, the world's most popular electric vehicle sold a record 3,117 units, the first time any pure electric vehicle has sold over 3,000 units in a month in the US (unless Tesla managed that feat but rolled the number into a quarterly report). This marks the 15th month in a row of record Leaf sales and the seventh where the Leaf was the top EV seller in the US. The challenge bar is set for someone to step up to compete with this all-electric wunderkind. Chevrolet did sell over 3,000 Volts once, in August 2013. The Leaf's one long-standing competitor, of a sort, is the Chevy Volt, which used to regularly outsell the Leaf but moved only 1,684 units in May. That's still an increase of 4.8 percent over 2013 but is part of a 4.5 percent decline in year-to-date Volt sales for 2014 compared to last year. The last time the Volt outsold the Leaf was October 2013. Chevrolet did sell over 3,000 Volts once, when it moved 3,351 in August 2013. Let's take another look at those 3,117 Leafs sold last month. They represent a 45.8 percent increase over May 2013, when 2,138 Leaf EVs were sold, so someone is doing something right in Japan and Tennessee. So far, Leaf sales in the US are up 36.4 percent year-to-date, to 10,389 EVs. That's just under half of the 2013 total, and it was accomplished in five months. In 2013, Nissan sold a total of 22,610 Leafs. Anyone want to hazard a guess where the total will be at the end of the year? As always, we'll have our detailed monthly sales write-up including other plug-in vehicles as well as hybrids and diesel car, up soon. For now, though, the big news is big Leaf sales. Read Nissan's press release below. Nissan Group reports May 2014 U.S. sales May 2014 May 2013 % Change Nissan Group Total sales (units) 135,934 114,457 +18.8 Nissan Division May sales 125,558 106,558 +17.8 Infiniti May sales* 10,376 7,899 +31.4 NASHVILLE, Tenn. – Nissan Group today announced total U.S. sales for May 2014 of 135,934 units, an increase of 18.8 percent over the prior year and a May record. Nissan highlights: Nissan Division set a May record at 125,558 sales in the month, an increase of 17.8 percent. This marks a monthly record for Nissan division in 14 of the last 15 months. May was the best-ever month for Nissan LEAF with 3,117 sales, an increase of 45.8 percent over the prior year. In May, LEAF passed 50,000 total U.S. sales since launch, further establishing it as the leader among electric vehicles.

GM trucks get hybrid versions, but you'll probably never see one

A few years ago, General Motors sold hybrid versions of its Chevy Silverado and GMC Sierra pickups. They weren't very good, using GM's old two-mode hybrid system that resulted in only negligible fuel economy gains. But GM's trying again, launching eAssist models of the 2016 Silverado and Sierra that are said to offer 2-mpg improvements in city, highway, and combined fuel economy ratings. Problem is, you probably won't be able to get one. Only 700 eAssist trucks will be made for the 2016 model year – 500 Silverados and 200 Sierras. When you consider that GM moved 824,683 examples of its light-duty pickups in 2015, this small run represents 0.08-percent of all Silverado/Sierra production, and GM says it "will monitor the market closely ... and adjust as appropriate moving forward." But that's not the only limitation. The eAssist trucks will only be sold through California dealers. For the Silverado, eAssist can only be optioned on the 1500 Crew Cab 1LT 2WD model, and for the Sierra, the fuel-saving technology is solely available on the 1500 SLT Crew Cab 2WD model with the SLT Premium Plus package. Granted, in terms of the Sierra, that means you get niceties like LED headlights and taillights, Apple CarPlay and Android Auto, Bose premium audio, heated seats and steering wheel, lane keep assist, and more. In the trucks, eAssist combines a small electric motor and 0.45-kWh battery pack with the pickups' 5.3-liter V8. GM estimates total output of 355 horsepower and 383 pound-feet of torque – no more horsepower than the non-eAssist trucks, but three more pound-feet of torque. GM says the eAssist trucks can tow up to 9,400 pounds, and the battery only adds 100 pounds to the trucks' weight. The electric motor provides 13 hp and 44 lb-ft of torque for a boost of acceleration off the line, or during passing. It also allows the engine to run in four-cylinder mode for longer periods of time. eAssist uses regenerative braking to help power onboard electrical systems, and adds start/stop to the powertrain. Finally, the so-equipped trucks have a six-percent improvement in aerodynamics, thanks to a soft tonneau cover and active grille shutters in the front fascia. Great news is, the eAssist option is relatively inexpensive, only costing $500. But good luck getting your hands on one.