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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.

The best Super Bowl car commercials from the last 5 years

If you've been dipping into the Autoblog feed over the past days and weeks, you wouldn't even have to be a sports fan to know the Super Bowl is coming up. Automakers have been teasing their spots for the big game, dropping them days early, fully-formed onto the Internet and otherwise trying to amp up the multi-million-dollar outlays that they've made for air time on the biggest advertising day of the year. And, we're into it. The lead up to the Super Bowl is almost akin to a mini auto show around these parts; with automakers being amongst the most prolific advertisers on these special Sundays. The crop of ads from 2015 looks as strong as ever, but we thought we'd take a quick look back at some of our favorite spots from the last five years. Take a look at our picks – created from a very informal polling of Autoblog editors and presented in no particular order – and then tell us about your recent faves, in Comments. Chrysler, Imported From Detroit Chrysler, Eminem and a lingering pan shot of "The Fist" – it doesn't get much more Motown than 2011's Imported From Detroit. With the weight of our staffers hailing from in and around The D, it's no wonder that our memories still favor this epic Super Bowl commercial (even though the car it was shilling was crap). Imported really set the tone for later Chrysler ads, too, repeated the formula: celebrity endorsement + dramatic copy + dash of jingoism = pulled car-guy heartstrings. Mercedes-Benz, Soul teaser with Kate Upton One of our favorite Super Bowl commercials (and yours, based on the insane number of views you logged) didn't even technically air during the game. Mercedes-Benz teased its eventual spot Soul with 90-seconds worth of Kate Upton threatening to do her best Joy Harmon impression. (Teaser indeed.) It doesn't win points for cleverness, use of music, acting, or any compelling carness, but it proved that Mercedes' advertisers knew how to make a splash in the Internet Age. And, hey, it's still classier than every GoDaddy commercial. Kia, A Dream Car. For Real Life Like the Mercedes video above, the initial draw here is a pretty lady; in this case the always stunning Adriana Lima. But this Kia commercial really delivers the extra effort we expect while scarfing crabby snacks and homemades, too. First of all, Motley Crue. Second, a cowboy on a bucking rhino. Enjoy yet again.

Recharge Wrap-up: BYD electric buses at Special Olympics, hybrids perform better than rated

A new study finds that real-world fuel economy of hybrids could be significantly higher than EPA ratings. Researchers at the University of Vermont, with the help of their own "total on-board tailpipe emissions measurement system," found the fuel savings of Toyota Camry Hybrid over a standard Camry to exceed its sticker values by 18 percent on the highway and 33 percent in the city. The results of this study suggest that the projections of the fuel and emissions benefits of hybrids could be adjusted to reflect more these more positive real world values. The study's authors, Britt A. Holmen and Karen M. Sentoff, say more research is warranted based on these findings, and that "similar studies can be used to develop robust models of all types of HEV platforms under actual driving conditions and improve quantitative estimates of the future fleet contributions to the US CO2 emissions inventory and petroleum consumption." Read more at Green Car Congress. The 2016 Chevrolet Volt made an appearance at the 2015 Brickyard 400 at the Indianapolis Motor Speedway. Chevy displayed the silver Volt alongside a Camaro and Malibu of the same color and model year. The Volt also recently made an appearance at the premier of Tomorrowland with George Clooney behind the wheel. Read more at The News Wheel. BYD electric buses provided transportation at the Special Olympics 2015 World Games in Long Beach, CA. Shuttling 6,500 athletes required the help of multiple charter companies, including local buses from the Chinese automaker. "BYD stepped up majorly as one of our key supporters and their tremendous efforts made our athletes feel welcomed," says Long Beach Community Foundation President and CEO, and 2015 Host Town Transportation Coordinator Marcelle Epley. "We depended on them, and they came through 100 percent." Both Los Angeles and Long Beach have recently decided to purchase electric buses from BYD. Read more in the press release below. BYD Zero-Emission Buses Used to Transport Athletes at 2015 World Games LONG BEACH, Calif., Aug. 2, 2015 /PRNewswire/ -- This week the largest Special Olympics ever was hosted in the City of Long Beach – thousands of athletes, coaches, dignitaries and families descended upon Los Angeles for what was a spectacular week of uplifting camaraderie, sportsmanship and competition.