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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.

Cadillac prices 410-hp XTS Vsport from $63,020*

Cadillac has officially released pricing for the 2014 XTS Vsport. Buyers can expect to pay $63,020 for the fleet four-door, including destination and handling fees. That kind of coin will snag you a twin-turbocharged 3.6-liter V6 good for 410 horsepower and 369 pound-feet of torque. As you likely already know, engineers have done a lot more than simply bolt a pair of turbos onto the company's tried and true naturally aspirated 3.6-liter V6. The engine uses an all-new block, strengthened connecting rods and domed aluminum pistons and is fed through a revised direct-injection fuel system. Combined, the tweaks allow the V6 to suck down 12 psi of boost.
The price tag puts the 2014 Cadillac XTS Vsport well under potential (if ambitious) competitors like the Audi S6 at $71,900, plus destination fees. A base BMW 550i will set you back $62,700, excluding destination charges, but throwing options at the German sedan will quickly see that number climb higher. You can check out the full press release below for more information.

Book by Cadillac is like a streaming service for cars

Cadillac is launching a subscription-based service that gives users access to most of its models for a flat fee of $1,500 a month. Called Book by Cadillac, the program starts in February in New York City and its surrounding areas. Cadillac's goal: attract users who want flexibility without the costs and commitment of ownership. The monthly fee is steep, but Cadillac argues it's competitive with the cost of leasing a well-equipped luxury car. It also includes maintenance, taxes, and insurance fees. The Book service can also be stopped at any time, which frees users from any payments. There's no restrictions on mileage, though users pay for gas either by filling up the car when they're done with it or through a Caddy concierge who bills their account. Cadillac will deliver and pick up the vehicles from the user's choice of location via a white-gloved driver. Users can change vehicles up to 18 times per year, and they can be reserved with a mobile app. The theoretical goal is a Book user could head to the airport in New York in a Cadillac and reserve another one for their use in Los Angeles. Cadillac ran a test program last year and decided to move forward with Book after receiving a positive response on the price and features. "The overwhelming result is this is something competitive," spokesman Eneuri Acosta said. The program features the Escalade, Escalade ESV, CT6, CTS-V, ATS-V, and XT5 decked-out in Platinum trim. Other vehicles, like the non-V-series ATS or CTS could be added if there's demand. Book by Cadillac starts in New York, but will expand to other unspecified markets. Related Video: