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FCA's Pentastar V6 gets more power, efficiency for 2016

Already a vital member of FCA's powertrain lineup, the 3.6-liter Pentastar V6 is receiving major efficiency improvements for 2016. Thanks to a massive amount of new tech attached to the mill, fuel economy is up six percent, and torque below 3,000 rpm jumps nearly 15 percent. The updates arrive first in the 2016 Jeep Grand Cherokee, but they should proliferate to other models eventually. At least in the Grand Cherokee, the tweaks push power up five horsepower to 295 ponies. FCA's engineers went through the Pentastar from top to bottom to eke out as much efficiency as possible. For example, there's now a two-speed variable-valve lift system that can run in low- or high-lift modes. This upgrade is responsible for 2.7-percent better economy, the company claims. A new intake manifold with longer runners and updated variable-valve times also helps boost the torque output. Further improvements come from pushing the compression ratio to 11.3:1, from 10.2:1 before. Perhaps most impressive is that despite all of the innovations, the latest Pentastar actually weighs four pounds less than the current version. Beyond the Pentastar improvements, all of the FCA US gasoline engines, except for the Viper's 8.4-liter V10, will be E15-compatible for 2016. The company says that it wants to be ready for the higher ethanol content fuel's greater use in the near future.

Daily Driver: 2015 Jeep Wrangler Unlimited X Edition

Daily Driver videos are micro-reviews of vehicles in the Autoblog press fleet, reviewed by the staffers that drive them every day. Today's Daily Driver features the 2015 Jeep Wrangler Unlimited X Edition, reviewed by Adam Morath. You can watch the video above or read a transcript below. Watch more Autoblog videos at /videos. VIDEO TRANSCRIPT Hi, I'm Adam Morath for Autoblog. Now, undoubtedly, one of the coolest things about this job is that you're in and out of so many different vehicles, but, I'll be honest, there are times where, if you're in very similar vehicles, they can start to run together a little bit. That's why I love getting into a car like this that just snaps you right out of it because it's so unique and so different from anything else on the market. Of course I'm talking about the Jeep Wrangler. I'm in a 2015 Jeep Wrangler Unlimited. This is the X Edition, which stands for X Games. Jeep is a big title sponsor of the 2015 Aspen X Games and you can see that all over this vehicle. You have white, glossy accent plastic in the interior; mountain graphics throughout the interior and exterior of the vehicle – a nod, obviously, to the winter sports and skiing that you would do out in Aspen. And then in keeping with that mountainous theme, you have an Alpine nine-stereo speaker system. I'll be honest, though, that some of it feels a little overdone to me. For instance, there's a power-bulge in the hood. Credit to Jeep: the vents are actually functional, but this is not the trim I would go for, just personally. It's one of those vehicles that people are always wondering, "I really like the look of it [and] I like the capability, but could I live with a Wrangler?" It's the same sort of question you'll get from people who are looking at a sports car, "could I actually live with this is my daily driver?" And I have to say, Jeep has come a long way – Wrangler, in particular, has come a long way – in terms of driving comfort. Of course, don't expect "Lexus quiet." You can probably hear it's a big noisy in the cabin. It's a bit of a bumpy ride. There are things about this vehicle that I could see being annoying in your day-to-day life. For instance, the door: it's essentially an external hinge on the door, but it doesn't stay open for you. So, if you're on any sort of a tilt, the door will come back in and you have to just prop it open with your leg. Little things like that.

Jeep Begins Fixing 1.56 Million Recalled Grand Cherokee, Liberty SUVs

Chrysler is just now beginning the big job of fixing 1.56 million older Jeep SUVs seven months after a recall was announced, according to The Detroit News. Jeep Grand Cherokees sold between 1992 and 1998 and Jeep Liberty models sold between 2002 and 2007 are being recalled because the gas tank can leak in the event of a rear-end collision, leading to a fire. The National Highway Traffic Safety Administration originally requested the recall of 2.7 million vehicles. Chrysler initially disputed NHTSA's findings and seemed willing to go through a court battle until an 11th-hour deal reduced the number of vehicles involved in the recall. The remaining vehicle owners left out of the recall will receive a "customer service action" notification and may not get fixed. Chrysler says the vehicles are safe and need no repairs. Fixing the 1.56 million Jeeps will cost Chrysler $151 million. NHTSA cited 51 deaths causes by such tank fires. Chrysler plans to install protective trailer hitches to protect the gas tanks, but even the automaker admits the hitches will only provide incremental protection in a low-to-moderate speed rear-end crash. Related Gallery 2014 Jeep Cherokee Test Drive View 9 Photos Recalls Chrysler Jeep jeep liberty