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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.

Lincoln Aviator vs Cadillac XT6 | How they compare on paper

There have been big, three-row family crossovers for quite a while now, but until recently the luxury market hasn't fully embraced them. Sure, you could literally get one with a third row, but unless you were a kid, chances are the term "dungeon-like" was going to be tossed around. Things are changing now, however, as new and redesigned entries are starting to hit the market. We've recently had a chance to get our first drives of the 2020 Lincoln Aviator and 2020 Cadillac XT6, two all-new three-row crossovers from American luxury brands. We also got a turn behind the wheel of the updated 2020 Volvo XC90. However, since none of our editors have yet to drive to drive them all, we wanted to see how they compare on paper, examining their engine specs and interior dimensions. We also included the 2020 Acura MDX, the original three-row luxury crossover, which continues to sell well despite approaching the end of its current generation. That it offers a hybrid model makes it that much more applicable given the Aviator and XC90 also offer gasoline-electric powertrains, albeit of the plug-in variety. 3 Row Luxury Crossovers Powertrains View 1 Photos Non-hybrid MDX has a 5,000-pound max tow rating. How do their performance and fuel economy compare? This one is absolutely no contest. The 400-horsepower Lincoln blows away its competitors despite having a price tag that's similar to the 310-horsepower Cadillac and in between the XC90's T5 and T6 models. At least the Acura is considerably cheaper. Besides the eye-popping output, the estimated 0-60-mph time of 5.5 seconds (gleaned from the mechanically similar Ford Explorer ST) is appreciably quicker than the others. Now, fuel economy is a bit lower, but the efficiency of Volvo's four-cylinder engines are likely more susceptible to varying due to driver differences. It should also be noted that the Cadillac gets the same combined fuel economy estimate as the Aviator despite having 90 fewer horses and 144 fewer pound-feet of torque. Just one of the ways where the XT6's prospects dim in the presence of its cross-Michigan rival. The Cadillac is also not available as a hybrid model. The others are, but are disparate. The Lincoln Aviator Grand Touring and Volvo XC90 T8 are similar in concept: range-topping models that are as much about adding performance as they are fuel economy. Their hefty price tags certainly reflect that as well.

2014 Cadillac ELR is making green sexy in Detroit

In terms of styling, inside and out, the ELR hits the ball out of the park.
Cadillac has pulled the wraps off of its newest family member, the long-rumored, Voltec-powered, eye-catching extended range hybrid coupe called the ELR. The car makes use of the same basic architecture as the Chevrolet Volt, but has been thoroughly layered on with design, technology and performance tuning - with the goal of being a properly situated product for the Cadillac brand.