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These are your top 10 worst-selling vehicles of 2012

Despite 2012 being the best year of auto sales this country has seen since 2007, not every vehicle got an equally large share of the sales pie. Some barely got a sliver, as evidenced by this year's list of the top 10 worst-selling vehicles of 2012. We've dug through sales data from every automaker to come up with this year's list and, like last year, we've set some parameters to ensure it includes legitimately bad-selling vehicles. The first parameter is a starting MSRP under $100,000, which automatically excludes what's parked in most one-percenters' garages. We're also excluding vehicles cancelled in 2012, even if they garnered sales through the end of the year while dealerships sold off remaining inventory. This includes models like the Mitsubishi Eclipse, Mercedes-Benz R-Class and last year's worst-seller, the Acura RL. Next, vehicles are considered as they are reported by the automaker, which means that, while sales of the Murano CrossCabriolet were probably low enough to make the list, because Nissan reports only one number for all Murano sales, it was excluded. Cadillac, however, reports sales of the Escalade EXT separately from the Escalade, hence its repeat appearance. Finally, there was the question of whether or not eligibility should be given to Suzuki vehicles, as the brand announced in November that it would end sales in the US as soon as its current inventory ran out. We decided Suzuki vehicles should be included as the brand was offering 2013 models at the time of the announcement, and as far as we can tell, inventory levels remained high enough to satisfy demand through the end of the year. Without further ado, below are the top 10 worst-selling vehicles of 2012. Top 10 Worst-Selling Vehicles of 2012 10. Volvo C30 MSRP: $25,500 Units Sold: 2,827 Last Year: – 9. BMW Z4 MSRP: $47,350 Units Sold: 2,751 Last Year: – 8. Audi TT MSRP: $39,545 Units Sold: 2,226 Last Year: – 7. Subaru Tribeca MSRP: $32,595 Units Sold: 2,075 Last Year: 10 6. Suzuki Equator MSRP: $19,449 Units Sold: 1,966 Last Year: 7 5. Cadillac Escalade EXT MSRP: $63,060 Units Sold: 1,934 Last Year: 6 4. Nissan GT-R MSRP: $96,820 Units Sold: 1,188 Last Year: – 3. Acura ZDX MSRP: $50,920 Units Sold: 775 Last Year: 4 2. Mitsubishi Lancer Sportback MSRP: $18,495 Units Sold: 702 Last Year: 3 1. Mitsubishi i-MiEV MSRP: $29,125 Units Sold: 588 Last Year: – Want a little more "worst-selling" data? Check out our list of the top 10 worst-selling vehicles of 2011.

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.

2015 24 Hours of Le Mans live race report

Check back regularly for more race updates every few hours. No, you don't need to stay up for the entire 24 Hours of Le Mans, but if you want to catch any of the action, Autoblog friend Reilly Brennan has a handy guide. And to keep you up to speed on the latest race events, we'll be posting live from Le Mans with regular race reports.Hour 1: Five laps in, Audi breaks up the three Porsches at the front, with the #19 919 Hybrid, driven by Nico Hulkenburg, passed by all three R18s. Hulkenburg eventually took back fifth position only to fall back again after the first pit stop. Meanwhile, clutch trouble kept the #23 Nissan GTR-LM in the pits until 15 minutes into the race. The other two Nissans were forced to start at the back of the grid after failing to the meet the 110 percent qualifying speed regulation. At the end of the first hour, just 7.5 seconds separated the first six cars. Then the factory team #92 Porsche GTE car caught fire, with the the #13 Rebellion P1 car taking frontal damage in the ensuing carnage. With the safety car out, the field is once again bunched up.Hour 2: The slugfest between Audi and Porsche continues, with neither side backing off. Halfway through the second hour the #7 R18 passes both leading Porsches for the top position. After another round of pits stops Porsche regains the lead until lap 30, when the Audi overtake once again and quickly pulls out a three-second gap. Nico Hulkenburg passes the other two Audis to join his Porsche teammates. At the beginning of the third hour it's Audi #7, Porsche #17, #18, and #19, followed by Audi #8 and #9. 33 seconds separates this group, with Toyota a minute back from the front car.Hour 3: On track the action refuses to stop. Although it's early, Audi is looking strong with the overall lead in the #7. What's more is that the Audis run four stints per set of tires, while the Porsche cars have to change rubber every third stop. But after a quick refueling, the lead R18 gets a tire puncture and comes back in 3 laps later, allowing Porsche to take over the top two spots. Then as the hour closes out a yellow flag causes traffic to bunch up and the #8 Audi gets stuck with nowhere to slow down. Driver Loic Duval dives for the side of the road but hits the guard rail and careens across the track, damaging the front and rear bodywork. The rest of the car is still intact, though, and once in the pits Audi replaces the entire front and rear of that in only three minutes.