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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.

Is Lincoln MKC cutting into Cadillac SRX sales?

The two big American luxury brands of Cadillac and Lincoln are on surprisingly similar paths at the moment with both divisions hoping to redefine themselves and grow popularity. They're still early in the process with no clear winner yet, but things might actually be looking up for Lincoln's latest model, according to a monthly sales analysis from The Motley Fool. It seems, at least early on, that the new MKC crossover might be taking a bite out of the Cadillac SRX's growth.
The MKC launched just a few months ago and has been getting a big marketing push from a series of oft-mocked ads starring the smooth-talking Matthew McConaughey. The luxury CUV has been the popular, new kid on the block with growing sales since its introduction. While smaller than the SRX, the Lincoln starts at a lower price and offers better fuel economy.
Through June, the SRX performed well with sales up over 20 percent on average through June, according to The Motley Fool. However, July and August saw things plummet with year-over-year drops of 7 percent and 37 percent, respectively. It still far outsold the MKC in terms of actual units in a given month, but the Caddy's continued growth has appeared to stagnate.

GM design boss Welburn says Lincoln isn't a Cadillac rival [w/poll]

General Motors Vice President of Global Design, Ed Welburn, had some dismissive words for a certain cross-town luxury brand during an interview with Car and Driver. When asked about his thoughts on Lincoln, Welburn deflected, before saying, "I don't consider Lincoln to be a competitor for Cadillac."
"They're not a global luxury brand. I don't consider them a competitor. Are they a competitor for Buick? Quite possibly. But not for Cadillac," GM's head designer explained. Welburn, who's been at the helm of GM Design North America since 2003 and is the first to hold the position of VP of Global Design, has been instrumental in the styling renaissance at GM, so predictably, Car and Driver's interview with him focused on the design aspect of cars.
During the interview, Welburn explicitly denied plans for a reborn Cadillac XLR, even as a new Chevrolet Corvette is hitting the market and strides are being made with Cadillac's V-Series performance arm saying, "We have a lot of cars that we're working on for the Cadillac brand. The XLR is not one of them right now."