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Weekly Recap: New bosses try to jump-start Cadillac and Lincoln

Both of America's domestic luxury brands seem to be stuck in neutral.
It's ironic that Cadillac and Lincoln got new bosses within days of each other this month. It's also a commentary on the fact both of America's domestic luxury brands seem to be stuck in neutral.

A look inside Infiniti's variable-compression engine

We're sympathetic to anyone who had trouble understanding what's going on with Infiniti's new variable-compression engine. While we got a full tech briefing on the novel VC-Turbo back in August, the visual aids were lacking. The cutaway engine Infiniti brought to the Paris show fixes all of that. You can thank the little green and pink lines on the cutaway for making the whole idea a little more clear. Click through the gallery to see two lines – one green and one pink – that represent the different strokes allowing for different compression ratios. Remember, the compression ratio is the amount of volume in the cylinder on intake compared to the amount at the end of the compression stroke. Leave more room at the end and you lower that ratio. The length of the stroke doesn't change with this system, but where it sits along the cylinder does. Hence those two lines. The variable compression ratio allows this new turbocharged engine to maximize fuel economy when the turbo isn't needed by raising the compression ratio. It will see its first use in the next Infiniti QX50 crossover, previewed by the QX Sport Inspiration concept that's also on display in Paris, and has performance targets of 268 horsepower and 288 pound-feet of torque. After, it will migrate to other Infiniti and Nissan vehicles, with transverse front-drive-based applications first in line. Eventually, it's likely to completely replace Nissan's corporate 3.5-liter V6. We'll be poking around the engine a little more in Paris today to try and get some more info. For now, enjoy those cutaway images and those friendly little lines. Featured Gallery Infiniti VC-Turbo engine cutaway View 14 Photos Paris Motor Show Infiniti Nissan Technology Emerging Technologies engine 2016 paris motor show

Recharge Wrap-up: Infiniti PHEV, free biodiesel?

In certain cases, biodiesel is so inexpensive that it is essentially free to use. Thanks to the decline of crude oil prices, other fuels, including biodiesel, have been following the trend. After setting new renewable fuel mandates, Congress also reinstated a $1-per-gallon tax credit for refiners. With such low prices, Midwest refiners are paying as low as $0.645 per gallon. In California, however, additional incentives mean some customers could get money back on the biodiesel they use, depending on the deals between producers and blenders and whether or not they share the credits. Read more from Ag Web. Infiniti is considering adding plug-in hybrid technology to its vehicle lineup. Infiniti CEO Roland Krueger says that it will leverage the EV expertise from Nissan for the electrification of its cars. Don't hold out for a luxury version of the Leaf wearing an Infiniti badge, though. When asked if an all-electric Infiniti were out of the questions, Krueger says, "Performance and the range are very important in the premium segment, so we believe that for Infiniti a hybrid or plug-in hybrid is the right proposition at this time." Read more from Automotive News Europe. Hyundai Tucson Fuel Cell drivers in California have logged a cumulative 1 million miles. With nearly 100 Tucson Fuel Cells sold so far in Southern California, these drivers have prevented some 385 tons of CO2 emissions. "Breaking the seven-figure consumer mileage barrier gives us new vision into the unlimited zero-emissions potential for Hyundai's fuel cell vehicles," says Hyundai's Mike O'Brien. "With our growing fleet of hydrogen-powered Tucson fuel cell vehicles accumulating one million miles this quickly, one can only imagine the unlimited potential for a zero-emissions hydrogen vehicle future." Read more in the press release below. Hyundai Tucson Fuel Cell Drivers Accumulate More Than One Million Zero-Emission Miles Cumulative Zero-emissions Miles by Southern California Fuel Cell Drivers Breaches the Seven-Figure Mileage Barrier Fuel Cell clean H2O emissions effectively replaced approximately 385 Tons of CO2 emissions compared with gasoline vehicles of similar size FOUNTAIN VALLEY, Calif., Feb.