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'Killing a Duramax' Gale Banks YouTube series methodically tunes a diesel to death

Learning or perfecting a skill by watching YouTube videos is known as attending YouTube University. GM Authority picked up on one of the video site's more fascinating courses, hosted by Gale Banks; in a fair world, he should be referred to as Professor Banks when it comes to diesel engines and truck tuning. A few months after GM introduced the updated L5P 6.6-liter Duramax diesel V8 in the 2020 Chevrolet Silverado HD and GMC Sierra HD that ships with 454 horsepower and 910 pound-feet of torque, Banks decided he wanted to methodically tune the engine to death. The purpose of the resulting series, called "Killing a Duramax," is to push more power out of the engine in order to discover which parts break and when — or, as Banks puts it, force-feed the Duramax "until the crank hits the street and the heads hit the hood." With that knowledge, Banks can figure out all the weak points on his way to building what he calls a "Superturbo," that being a supercharged, twin-turbo race engine with more than 1,000 hp. What makes the series fascinating is Banks' knowledge, paired with the company's comprehensive iDash engine monitoring system that keeps tabs on a glut of parameters every step of the way. So for instance, you get Banks explaining the differences between inches of mercury and barometric pressure, how those are different from the water content of the air measured in grains, then showing those readouts on the iDash, then explaining in detail how they affect the air density in the Duramax system. The stock Borg-Warner variable turbo gets a lot of airtime — Banks accuses it of being "out to lunch" because he feels it's the weakest link on the engine. That turns into a turbo teardown and a deep explanation of performance pitfalls, such as when air pressure on the turbine begins to diverge from the boost pressure coming from the compressor. Banks says he can keep close tabs on where power's coming from, because the iDash monitors the horsepower contribution provided by the ambient air, the turbo, and the intercooler separately. The major changes so far are a stouter Precision 7675 turbo and TurboSmart wastegate (episode 5), a twin intake (episode 6), a custom liquid-cooled intercooler from a marine engine, a new GM oil cooler and synthetic oil (episode 10), and new injectors (episode 11).

15 vehicles most likely to surpass 200,000 miles

Americans drive a lot. Collectively, we put, on average, more than 13,000 miles on our cars each year according to the U.S. Department of Transportation. Because of this, a vehicle's ability to travel long distances without major problems is a huge consideration when it comes time to purchase a new one. It's also worth remembering that keeping an older car on the road instead of trashing it and buying new can be considered an eco-friendly decision. After all, it takes a lot of resources to build a car. iSeeCars.com, a website that aggregates used car listings from all around the country, recently ran through the numbers on millions of vehicles that are currently on the road to determine which last the longest. Alternatively, you could choose to look at this list as vehicles likely to be driven by owners who travel long distances. Either way, we've laid out the top 15 vehicles most likely to hit or even surpass the 200,000-mile mark. It's important to note that while these are the vehicles that have stood the test of time up until today, we can't guarantee future results if you decide to opt for one of these from a current model year. That said, unless we specifically say so in the text below, we've used pictures of current models for illustrative purposes. Now, with all of that out of the way, scroll on down for the top 15 vehicles most likely to crest 200,000 miles. 15: Toyota Sienna 14: Honda Odyssey The 15th spot and 14th spot on the list of the top 15 vehicles most likely to surpass 200,000 miles are both minivans. Spoiler alert: They will be the only two minivans on the list. According to iSeeCars, 3.2% of both of these family haulers crest the 200,000-mile mark, making them the best bets for families looking to put a ton of miles on their machines. 13: Honda Ridgeline 12: GMC Yukon The next spot on the list is occupied by the Honda Ridgeline pickup truck with 3.7% lasting past 200,000 miles. Unlike any of the other midsize trucks it competes with, the Ridgeline is based on a unibody chassis. Opting for this more car-like structure — as opposed to a traditional body-on-frame layout — allows Honda's hauler to ride and drive more like a car. Up next is the GMC Yukon, also with 3.7% past the 200K mark, and the first, but very much not the last, big traditional SUV you'll see on the list. In fact, get ready to see a whole bunch of 'em, including several from GMC parent General Motors.

GM sees 'strong year' in 2018, then gold in Chevy Silverado for 2019

DETROIT — General Motors said on Tuesday it expects earnings in 2018 to be largely flat compared with 2017, but that profits should pick up pace in 2019 as its revamped line of high-margin pickup trucks hits the U.S. market. The 2018 earnings outlook was above market expectations, sending GM shares up more than 3 percent in premarket trading. "GM had a very good 2017 as we continued to transform our company to be more focused, resilient and profitable," GM Chief Executive Mary Barra said in a statement. "We are positioned for another strong year in 2018 and an even better one in 2019." GM and its Detroit rivals, Ford and Fiat Chrysler Automobiles, are bringing on new trucks at a time when overall U.S. new vehicle sales have been falling, but truck sales continue to grow as consumers abandon passenger cars in favor of pickups, SUVs and crossovers. GM on Saturday fired a new round in the battle for profits from one of the U.S. auto industry's most lucrative segments when it showed a new generation of its Chevrolet Silverado pickup truck at the Detroit auto show. The new Silverado, a highlight of the event, is the successor to GM's best-selling vehicle in North America. Sales of the current Silverado rose nearly 2 percent to 585,000 vehicles in 2017. In the coming months, the company will also reveal a revamped GMC Sierra pickup truck. U.S. new vehicle sales fell 2 percent in 2017 after hitting a record high in 2016, and are expected to drop further in 2018 as interest rates rise and more late-model used cars return to dealer lots to compete with new ones. GM said on Tuesday that while it retools a factory in Ft. Wayne, Indiana, to make the new pickup trucks, it will shift some production to an Oshawa, Ontario, plant in order to avoid missing sales in a hot market for the vehicles. The No. 1 U.S. automaker said it will record a $7 billion non-cash charge for its fourth-quarter 2017 earnings related to deferred tax assets. GM said it expects capital expenditure in 2018 of around $8.5 billion, about $1 billion of which will go toward funding self-driving car technology. Last week, the company said it is seeking U.S. government approval for a fully autonomous car — one without a steering wheel, brake pedal or accelerator pedal — to enter the automaker's first commercial ride-sharing fleet in 2019. GM said it expects 2017 earnings per share at the high end of its previously forecast range of $6 to $6.50.