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Chevy Volt, Nissan Leaf sales show big drops in September

As most readers likely know, it's not just lower gas prices that are affecting plug-in vehicle sales. The two long-time sales leaders in the US - the Nissan Leaf and the Chevy Volt - are getting long in the tooth. First introduced in late 2010, the vehicles have been updated here and there since then, but recent sales figures have been lagging behind where they were in 2014. This trend continued in September, with sales of both vehicles down in a big way compared to last year. Sales of Nissan Leaf totaled 1,247 for the month of September. This is down a whopping 56.7 percent from September 2014, but thankfully the year-to-date sales are not quite as negative. So far this year, Nissan has sold 13,630 Leafs, which is "just" 37.5 percent lower tan the YTD total at this point in 2014 (21,822). This decrease swims against the overall direction of Nissan's September sales, which were up 18 percent over last year and set a new September record. The Volt sold 949 units last month, down 31.9 percent from last September. Year to date, the Volt has sold 9,264 units, which is 36.3 percent lower than the number of Volts that were sold in the first nine months of 2014 (14,540). This downward trend might be coming to an end soon. The new Chevy Volt will go on sale in 11 US states later this fall, and the 2017 model will be available nationwide next spring. An updated Leaf for the 2016 model year also offers more miles – 107, vs 84 in the 2015 version – so potential customers who have been waiting for the latest and greatest will soon not have any excuses. We'll have our broader look at green car sales in the US up soon. Green Chevrolet Nissan Electric Hybrid ev sales hybrid sales volt

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.

Autoblog Podcast #327

New York Auto Show, Jim Farley interview, 2014 Chevrolet Silverado fuel economy, Ford fuel economy app challenge
Episode #327 of the Autoblog Podcast is here, and this week, Dan Roth, Zach Bowman and Jeff Ross talk about this year's New York Auto Show, Chevrolet's latest assault in the pickup truck fuel economy battle, and Ford's reward for developing a better fuel economy app. Dan also has an interview with Ford's Jim Farley about the future of Lincoln. We wrap with your questions and emails, and for those of you who hung with us live on our UStream channel, thanks for taking the time. Keep reading for our Q&A module for you to scroll through and follow along, too. Thanks for listening!
Autoblog Podcast #327: