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GM 6.2L EcoTec V8 rated at 21 mpg by the EPA

General Motors is already laying claim to best-in-class power for its new 6.2-liter V8 that will be offered in the 2014 Chevy Silverado and GMC Sierra this fall, and now it has released fuel economy numbers for the big engine. Available as an option on the Silverado LTZ and High Country (shown above) models as well as the the Sierra SLT and Denali trims, the 6.2L EcoTec3 V8 will return 15 miles per gallon in the city and 21 mpg on the highway on rear-wheel-drive trucks; these numbers drop by one mpg each on four-wheel-drive models.
These estimates are in addition to the engine's 420 horsepower, 460 pound-feet of torque and max trailering capacity of 12,000 pounds, and considering all that power it's not terribly far away from the fuel economy of GM's equally new 4.3-liter V6 and its rating of 18 mpg city and 24 mpg highway. This announcement comes just days after a report indicated that GM is unable to keep up with the demand of the 5.3-liter V8 in the fullsize Chevy and GMC trucks due to supplier issues. GM's official press release for the 6.2-liter V8's fuel economy is posted below.

Sunday Drive: Variety is the spice of life

If there's any one new vehicle the entire world is anxiously waiting for, it's the Jeep Wrangler. Yes, of course the iconic off-roader has a loyal following here in America, but you could plop a Wrangler pretty much anywhere on the globe and everybody will know what it is. Put simply, the redesigned 2018 Jeep Wrangler JL has big, muddy shoes to fill, and the readers of Autoblog are just as interested in the Wrangler's rebirth as anyone else. Moving along, we were fortunate enough last week to spend a bit of time in nearly every version of the venerable Volkswagen Golf all in one day. There isn't a Golf we don't like, but there's one, easily identifiable by its three-digit name, that stands above all the rest: GTI. We think it's the best Golf you can buy, even if there's an R-badged variant that slots above the GTI in VW hierarchy. Rounding out our recap are three vehicles that could hardly be more different. The 2019 GMC Sierra, which was seen wearing pretty light camouflage, is a truck. The Lamborghini Terzo Millennio – which isn't going to go on sale, ever, at any price – is a conceptual supercar. And the Honda CB1000R is a retro-themed naked standard motorcycle. Variety really is the spice of life. 2018 Jeep Wrangler spy shot mega gallery Driving nearly every VW Golf: Base, GTI, R, Alltrack — here's what we learned 2019 GMC Sierra spied sporting just a thin wrapping The Lamborghini Terzo Millennio is a brutally fantastic EV supercar concept Honda unveils 2 new motorcycles, including retro-flavored CB1000R Image Credit: Brian Williams GMC Honda Jeep Lamborghini Volkswagen Technology Truck Convertible Crossover Hatchback SUV Performance sunday drive vw golf gti lamborghini terzo millennio

Diesel Power finds the ultimate modified oil-burner

For nine years, Diesel Power magazine has run the Diesel Power Challenge, this year's grindfest being "a week-long torture test that features seven events, nine trucks, 8,000 horsepower, and nearly 15,000 pound-feet of torque." The road to being crowned "the most powerful truck" starts with a dyno run, and then continues through the completion of a CDL-style obstacle course, an eighth-of-a-mile drag race while towing a 10,000-pound trailer, a quarter-mile drag race without a trailer, a fuel economy test in the mountains and finally a sled-pulling test through a 300-foot-long packed-mud pit.
What kind of trucks get into such a fight? Last year's winner, for instance - who upgraded his truck this year to prove he didn't "luck into the win" - drives a 2008 Ford F-250 Super Duty with a 6.4-liter Power Stroke V8 upgraded with a custom intake, Elite Diesel triple turbos and a two-stage nitrous system. Another competitor has a 2005 Dodge Ram 2500 powered by a 5.9-liter Cummins inline-six, upgraded with Garrett turbos, dual-stage nitrous, a seven-inch exhaust stack and twin fans built into the bed to cool the Sun Coast Omega transmission. The numbers on that truck: 1,255 horsepower, and 2,063 pound-feet of torque at the wheels. Naturally, as the image above might suggest, things don't always end well.
You'll find all five videos covering this years challenge below. A scene in the dyno video sums it all up perfectly: a competitor leaves his nitrous on too long and the crew is treated to some ominous poppings, he leans out the window, throws both hands up and shouts, "Amer'ca!"