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How GM's grueling 24-hour test gets the kinks out of its performance cars

One of the biggest challenges automakers face when designing a high-performance car is making sure that it is both fast and reliable. For General Motors, any car that might be taken to the track by its owner - like the Corvette, Camaro Z/28 (shown above) and the Cadillac CTS-V, for example - undergoes a rigorous and strenuous 24-hour test by engineers at the Milford Proving Grounds, as pointed out by Car and Driver.
We've posted on this topic in the past - on a video showing the Camaro ZL1 being brutalized, for instance - but this article gives a more in-depth look at what actually happens behind the scenes... including what that poor ZL1 went through. Though the test isn't for 24 hours straight, the cars are pushed as hard as possible by some of GM's best drivers with only the brakes and tires replaced frequently.
We don't want to ruin the fun for you, but it is an interesting article that tells just some of what GM does to develop its sports cars. Check out the full article over at Car and Driver for the rest of the story.

40+ cars that barely avoid the gas guzzler tax

The Gas Guzzler schedule, with mpg ratings and charges that haven't changed since 1991, lays out which fuel-swillers owe what to Uncle Sam.
I started thinking about the "Gas Guzzler Tax" - considerably less well known as The Energy Tax Act of 1978 - when I was driving Dodge's new Challenger SRT Hellcat last week. Unsurprisingly for a car that can burn 1.5 gallons of gas per minute at max tilt, theoretically able to empty a full tank of premium in about 13 minutes, the Hellcat will be subject to the Gas Guzzler Tax schedule when it goes on sale.

Meet the other Cadillac wagon. It's as American as ABBA

The Cadillac CTS Wagon became a cult classic the second it went on sale. We all knew that it was never going to sell in anything approaching significant numbers, and if that "we" didn't include those actually working at GM, one would have to wonder what they were smoking. Cadillac was still having a hard enough time trying to convince people that it was now a BMW-fighting sport luxury brand rather than the purveyor of Grandpa-piloted land yachts. To many, a sport sedan like the CTS seemed like a stretch. But a CTS sport wagon? It sure seemed like GM was just doing things for funzies, an impression only enhanced by the CTS-V Wagon. Forget cult classic. That thing was an instant legend.  And yet, the CTS wasn't the only Cadillac of that era offered as a wagon. It wasn't even the first. Before GM said "to hell with it, let's have some fun" on this side of the pond, over in Europe, it had already taken a page from its old badge-engineering playbook to create the 2006 Cadillac BLS Wagon. It was available as a sedan, too, but its awkward majesty is best enjoyed as the long-roof model.  There's just something off about the whole thing, right? That's probably because it also looks vaguely familiar, as if you've seen it before. So where the hell does this thing come from? Sweden! Behind that Cadillac Art and Science face is a Saab 9-3, and in the case of the BLS Wagon, the Saab 9-3 Sport Combi wagon. The roofline is the dead giveaway, as no other wagon has ever looked like that. In fact, the roof and windows were the only exterior elements to copy directly over from 9-3 to BLS. No kidding. With the Cadillac front end, doesn't the Saab-funky-boxiness make it look like a miniature hearse? The answer is yes. GM's design team, led by Ed Welburn, was quite pleased with his work. Perhaps it even egged him on to create a real Cadillac sport wagon? "The whole team was very excited to apply Cadillac's design language to a wagon for the first time," said Welburn in a press release from the time. "The V-shaped chrome-plated grille, a Cadillac hallmark, is picked up again by the shape of the rear window, and the body side character lines make it unmistakably a Cadillac." The interior is surprisingly different from the 9-3, including the ignition switch migrating from the center console up to the steering column. It also wasn't exactly in keeping with the Cadillac norm of the time.