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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).

2016 Chevrolet Malibu First Drive [w/video]

You have to appreciate honesty in this business. When a car company admits its offering in a segment isn't up to the task, it catches you by surprise. The surprisingly open Chevy reps stopped short of saying that making the last Malibu smaller was a mistake, but given that the righting of the ship included a lengthening of this new model, it was certainly implied. The eighth-generation Malibu lasted only three years, with a major update coming just one year in to try and fix some of the bigger concerns. The goal for the 2016 Malibu wasn't to make a competent product better, it was to make an okay one good again. That started with a stretch. The Malibu is long again, a big car that meets America's warped idea of a midsized car. Because of this, the Malibu's dimensions sidle up to the Impala's. In fact, it's within a fraction of an inch of the Impala's wheelbase measurement, and sits right between the last Malibu and the Impala in terms of EPA passenger volume. The back seat gets the most of the payoff, bringing it back into competition with other midsized counterparts. The Malibu is now one of the longest in the segment, but also among, if not the, lightest. The 2016 model is claimed to be about 300 pounds lighter than its dimensionally challenged predecessor. While most new models tend to choose between lighter or larger these days, Chevy managed not-insignificant improvements to both. Styling doo-dads no longer separate the trim levels, it's the features inside that fuel the upsell. Some of that weight came out of the front end. The aluminum hood is lighter than before, and we'd wager that's because it stops very short of the leading edge of the car. Instead, the nose is enshrouded in a big plastic fascia, which has to be an advantage at the scales but creates a somewhat unfinished look. That's amplified by the fact that everything ahead of the hood is a bit busy, and actually surprisingly aggressive, in contrast to the rest of the design. The new Cruze, with its cowl-to-grille hood, wears a more cohesive new-Chevy front end. The styling adopts the, dare we say it, coupe-like look of many (most?) new family sedans. The profile is attractive enough but almost generic now since the Chrysler 200, Ford Fusion, and others have already moved in this direction. The rear-end styling is inoffensive, almost original Mercedes CLS meets current Impala.

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.