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2017 Cadillac CT6 Plug-In Hybrid Drivers' Notes Review | Seamlessly green

In many ways, the Cadillac CT6 Plug-in Hybrid is the most interesting car the brand sells. Despite having a turbocharged four-cylinder hybrid powertrain, it makes the most torque of any CT6, even the twin-turbocharged V6 model. It also has a claimed electric range of 31 miles and can still manage a combined fuel economy of 26 mpg with just the gas engine. Even its origin is interesting, since its final assembly point is China. To cap things off, it's also the second most expensive CT6 in the range. To find out if the CT6 is worth that money, and has more to offer than fun facts, we spent some time behind the wheel. Editor-in-Chief Greg Migliore: I achieved 34.1 miles per gallon for my roughly 14-mile roundtrip in the CT6 hybrid. This sedan is a rolling example of where luxury is heading in the near term: Existing models souped up with hybrid tech, and the green features will go along way toward keeping big sedans like this relevant. It's a smart play for Cadillac to add a product like this. Otherwise, it's a fairly standard-issue CT6, which is a solid car. The flashy head- and taillights look great. The design is angled, creased and nicely proportioned. The interior is comfortable and roomy. It's a nice car. Cadillac invested a lot in the CT6, and it shows. Rumors have long swirled that the brand will add a larger flagship, though in this climate, that's hard to envision. For now, the CT6 does the job as Cadillac's standard bearer. Associate Editor Joel Stocksdale: Of all the different CT6 variants available, the CT6 PHEV is the one I would pick for myself. Why? Because the hybrid powertrain finally delivers on the quiet, refined driving experience I want from a flagship luxury sedan. I was a bit surprised by this, too, since the gas engine under the hood is the 2.0-liter four-cylinder used elsewhere, which isn't the smoothest thing in the world. But assist from the electric motor helps keep the four-cylinder from having to wind up too much to move the big Caddy, and when the gas engine does rev hard, it's well muffled by whatever insulation is in the car. Besides aural refinement, the power delivery is oil-on-ice slick. The blending of electric and gas power is seamless. There's no waiting on the turbo to spool up, and there's no loss of power at higher rpms with the electric motor. They work in perfect harmony providing excellent low-down grunt and solid upper-end power. The transmission is super smooth, too allowing for happy wafting wherever you go.

Why GM will import the Cadillac CT6 PHEV from China

There's a clear-cut reason that General Motors is going to build its upcoming plug-in hybrid CT6 sedan in China. Sure, the car will be sold in China and the US, but the real reason for the "Made In China" stamp is environmental. If an automaker wants to build a new model in China, adding a green powertrain is an easy way to do that. The CT6 will have both a PHEV option as well as standard gas engine versions. David Leone, Cadillac's executive chief engineer, told AutoblogGreen recently that, "[China is] far more receptive to approving localized production of vehicle programs that have new energy vehicle powertrain applications." To put it succinctly, since the CT6 has a PHEV option, it is easier for GM to build all CT6 models in China. Some of them will then be imported to the US. "Most new global Cadillacs will also be produced in China as well. It's our second-largest market in the world." "To bring any new car into China, to produce it, you need government approval," Leone said. "The government isn't interested in bringing many new cars to market that don't have new energy credits. [The CT6] also provides new energy credits that enables it to be an attractive, well-received product in China." Leone said that there are two main markets for the various CT6 models: China and the US. The car will arrive in the 2017 model year, so some time after the end of June 2016. There are other practical reasons to build the PHEV in China, like the cells in the battery pack. Those are provided by LG Chem, which makes some cells in Michigan but more in South Korea. And GM already builds cars in China through its joint venture with SAIC, Shanghai General Motors, or SGM. "In February 2013 we started making the XTS, in summer of 2014 we started making the ATS-L," Leone said. "We will be producing [the CT6] within a number of months. Most new global Cadillacs will also be produced in China as well. It's our second-largest market in the world." The Chinese and US versions of the CT6 will be identical, Leone said. While some Cadillacs sold in China are slightly different than the US versions – the Chinese ATS is 77 millimeters longer, for example – the CTS6 PHEV will be exactly the same in both places, other than slight tweaks to the trim levels. Still, "more of our cars going forward will be the exact same car," he said. That doesn't mean that sales will be the same everywhere.

Cadillac boss: We will have diesels

Johan de Nysschen doesn't usually mince words about his plans, and the Cadillac boss says that diesel-fueled models are on the horizon for the luxury brand in the US by the early 2020s. The four- and six-cylinder engines under development would launch first in Europe about 2019. "We will definitely bring them to the US," de Nysschen said during a press event, according to Automotive News. Unfortunately, the Cadillac president isn't saying which models would get the diesels, yet. This plan has been in the works for at least several months, and Cadillac made mention of the two oil-burners earlier this year during the unveiling of its new V6 engine. De Nysschen broached the possibility during an interview at the 2015 Detroit Auto Show, and he also referred to the inclusion of hybrids and plug-ins into the company's lineup at that time. Last year, a rumor suggested the addition of a V6 turbodiesel into the Escalade range. There were also rumblings of an oil-burning ATS during that model's launch. While Cadillac is no stranger to offering diesels in Europe, the decision to develop these new ones could come at an inopportune time. Governments there are rapidly moving against the fuel in favor of electrification. Tighter emissions regulations could also be on the way for the EU. Related Video: