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Is your new-car warranty good at the race track?

We've all heard the horror stories. Your buddy knows a girl that was dating a guy whose best friend's brother once broke his brand-new, recently purchased performance car while making runs at a drag strip or laps at a track day, and the manufacturer wouldn't cover the repair under warranty. True story? Urban legend? Complete crap? Yes, no, maybe. One thing's for sure: Automotive warranties have always come with caveats. In 1908, an ad in the Trenton Evening Times clearly stated: "All Ford Cars Guaranteed for One Year." Although it changed over time, by 1925 the Ford New Car Guarantee only covered 90 days on material and 30 days on labor, and it clearly stated that that there was "No guarantee whatever on Fan Belts, Glass, Bulbs, Wiring, Transmission, Bands, Hose Connections, Commutator Shells, Rollers, Spark Plugs or Gaskets." Whether or not Ol' Henry would pay to fix your Model T if you broke it shaving a tenth off your lap time at the local board track seems to be lost to history. We're guessing no. But what about today? Do new-car warranties in 2017 cover cars when they are driven on race tracks? We researched the warranties of 14 auto brands to find out, and the answer is yes, no, maybe, depending on the brand, in some cases the model, and whether or not your car is modified from stock. Acura has been out of the high-performance car game for a number of years, but jumps back into the party in 2017 with its hybrid-powered $173,000 NSX supercar. And Acura's warranty, as well as Honda's, clearly states that it does not cover "the use of the vehicle in competition or racing events." View 33 Photos So we asked Sage Marie, Senior Manager of Public Relations for Honda and Acura. "If the car is stock, the warranty covers it on a track just as it does on the street. No question," he told us. "However, if the car is modified, say with slick tires or other components that would put higher stresses on the vehicle's parts and systems, then we would have to investigate the circumstances further." Marie went on to say the same would be true for any Acura model or Honda vehicle, including the new 2017 Honda Civic Si. This became a common theme. Chevrolet actually started this practice with the fifth-generation Camaro on the high-performance ZL1 and Z/28 models.

Infiniti's new VC-T changes the rules of small turbocharged engines

The upcoming Infiniti QX50 crossover does not get our pulse racing, no matter how shapely the QX Sport Inspiration concept that previews it may be. No midsize SUV does, to be fair. But it has something special under the hood – the world's first production variable-compression-ratio engine. That means the QX50's 2.0-liter turbo four, which makes 268 horsepower and 288 pound-feet of torque, will have up to 27 percent better fuel economy. Here's how it works. The trend of moving to smaller, turbocharged engines carries with it one big falsehood. Under low load when the turbo isn't needed, these engines are less efficient than an equivalent engine without a turbo because of the low compression ratio the turbo requires. That is, if you never need the extra power, you're wasting fuel. Turbocharged (and supercharged) engines use a lower compression ratio to prevent detonation. When you force extra air in a cylinder and mix it with fuel, it's more likely to prematurely go boom. Lowering the compression ratio prevents this problem, but it's less efficient. Infiniti's VC-T promises the best of both worlds, with a compression ratio that ranges from 8.0:1 for high-power turbo needs to a 14.0:1 ratio for fuel-sipping efficiency. At its heart the VC-T engine is a simple idea, but it's complicated to explain. Consider yourself warned. The photo below from Infiniti serves as a good visual overview. For the truly nerdy, this patent application covers the mechanical concept. Instead of having the pistons connected to the crankshaft, Infiniti's engine has a pivot arm with a connection on each end. One end connects to the piston, the other connects to a second lower shaft, which is controlled by an actuator arm. At any given time the engine's pistons move up and down according to the lobes on the crankshaft. But the actuator arm can change the angle of the pivot arm up and down. That is, the pistons still move in the same motion with the same stroke, but phase the entire stroke up or down. Move the pivot up and there's less room at the top, which means a higher compression ratio. Move the pivot down and the compression ratio goes down, too. As an added bonus, the lower shaft eliminates the need for counter-rotating balance shafts. Infiniti says this system works constantly and can vary the compression ratio to any number between 8:1 and 14:1. It also uses electronic variable valve timing on the intake valves to switch into Atkinson-cycle combustion for greater efficiency.

2018 Mitsubishi Eclipse Cross vs. small crossover SUVs: How they compare on paper

In the midst of the crossover SUV boom, each traditional size segment has become saturated. As a result, automakers are beginning to fill the gaps that separate classes, giving us some interesting in-between options. The all-new 2018 Mitsubishi Eclipse Cross jumps right into one of those in-between categories bookended by compact and subcompact crossovers. It's a niche that offers more space and feature content than the smallest vehicles, with an extra dose of style and a lower price than bigger ones. Because of the Eclipse Cross' in-between nature, though, there's not really an obvious direct competitor. As such, we've selected a diverse group of small crossovers that are similar to the Eclipse Cross in some but not all key areas: size, price, feature content, style and likely buyers. The 2018 Subaru Crosstrek, 2018 Toyota C-HR and 2018 Nissan Rogue Sport each have elements in common, but are different enough to provide useful points of comparison. A chart of specifications and key standard features is shown below, followed by more in-depth analysis. And if you wish to compare these crossovers with others not listed, be sure to check out our comparison tools. Engines and Drivetrains One of the Eclipse Cross' biggest advantages in this segment will be its engine. Subcompact crossovers, including the other three we've chosen, are sluggish to say the least. This new Mitsubishi should be different as it packs a turbocharged 1.5-liter four-cylinder that belts out a whopping 184 pound-feet of torque. We say whopping, because the C-HR, Crosstrek and Rogue Sport all have between 139 and 147 pound-feet. Horsepower is similarly unimpressive at just 152 horsepower - the same as the Crosstrek - but that torque should make passing and on-ramp runs much more satisfying. The appeal of crossovers for many people is the availability of all-wheel-drive, and this is where the Subaru gets an advantage. Like with all Subarus that aren't a BRZ, the Crosstrek has standard all-wheel drive. The Mitsubishi comes close, making all-wheel drive standard on every trim level except the very base ES trim level. On the Rogue Sport, all-wheel drive is an option on all trim levels. Depending on where you live, though, being able to have front drive on a high-trim crossover could be a plus because it will save some money and improve fuel economy. The C-HR loses this battle as it's only available with front-wheel drive.