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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!"

GM warning 800,000 owners that their cars may need oil changes more frequently than they say

The days of changing your engine oil every 3,000 miles are long gone thanks to most cars having automatic oil monitoring systems, but about 800,000 General Motors vehicles apparently have incorrect monitoring software that is leading to premature engine component wear. According to Autoweek, certain 2010-2012 Buick LaCrosse, Regal, Chevrolet Equinox and GMC Terrain models equipped with 2.4-liter four-cylinder engines could be going too long in between oil changes resulting in a higher-than-normal number of warranty claims for the engine's balance chain. The balance chain links the balance shaft to the crankshaft, and a worn one can produce higher noise levels.
As a fix, GM dealers will be reprogramming the software for the monitors in an effort to reduce the interval between oil changes, which varies based on driving habits and conditions. Through February 2015, the software update will be done at no cost to vehicle owners, but since this is not a recall, after that point, it will be up to the discretion of dealers as to whether or not they will charge for the service. What isn't immediately clear is whether GM plans on giving assistance to out-of-warranty customers who are experiencing engine issues from the worn chain.

2015 GMC Canyon

As discussed earlier today, the 2015 Chevrolet Colorado is a new standout in terms of midsize trucks. But the Colorado wasn't the only pickup the General Motors team brought to San Diego for us to sample. Also along for the ride was a pack of GMC Canyons, the slightly more expensive and polished platform-mate to the Chevy.
There's no question that the Canyon and the Colorado are a lot alike under the skin - almost entirely, in fact - so GMC has worked to first create some daylight between the two trucks by way of sheetmetal. This is most obvious from the front view, where the blocky and blingy GMC grille replaces the more subdued tone and shape seen on the Chevy's nose. Projector headlights with LED running lights come as standard, and, again, with the squared-off look that is typical of the brand. 16-inch aluminum wheels come stock on the GMC, too, with the 17-inchers seen on my photo truck offered as standard equipment on the top-trim SLT.
GMC considers the Canyon to be the only premium truck in the segment (which is clearly true), and the team has spent a ton of time and effort to get the interior correct to prove out that point. "Any trim that looks like metal, is metal," I was told at the product briefing, a certain indication that the company is serious about bringing a new class of buyer to a truck segment that it hopes to redefine.