2000 Jeep Cherokee Xj Sport 4x4, 4 Door, Automatic, 4.0l, Off-road Ready on 2040-cars

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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.

2018 Jeep Wrangler Rubicon Off-road Review | Earning our trail rating the easy way

LAKE TAHOE, Calif. — When all 4,145 pounds of Jeep slams down on the rock, the BANG! cuts the tranquility of California's Sierra Nevada mountains, echoes off the surrounding hillsides, and travels for miles through the thick unmolested forest of ancient pines. The brutality of the impact sends a shutter though the Wrangler's chassis, compresses our spines into its seat padding, and momentarily yanks my hands from its leather wrapped steering wheel. Then comes the high-pitch screeching as the torque of the Jeep's 3.6-liter V6 and the frenetic clawing from its knobby BFGoodrich All-Terrains as it violently drags the steel of the Wrangler's floorpan along the rock's face. There's a groan from the front suspension as it reaches max articulation and the inevitable crunch when the solid mass mangles the thin gauge stainless steel of the JL's tailpipe. With the first obstacle cleared and 16 miles of America's most challenging off-road trail still ahead, I realize the Rubicon Trail Foundation has a lively sense of humor. Flip open the organization's printed map of the "world-famous Rubicon Trail" and the first thing you see is a quick list of tips to help you get from one trailhead to the other safely and responsibly. Right under where it advises you to pack out all trash and use the portable toilets, it states, "High clearance vehicles recommended." LOL. ROTF. LMAO. Bwaaaaahaaaaaaaa. That's a good one. But I guess it takes just one jerk in a Camry to ruin it for the rest of us. Jeep Jamboree USA, an organization famous for its off-road events on the trail, makes the point with a little less comicality, "A minimum of 33-inch tires, front & rear lockers, tow points, skid plates, rocker panel protection and CB Radios are mandatory requirements for the Rubicon Trail Jeep Jamboree," states its website in oversized bold letters. Our 2018 Jeep Wrangler Rubicon, the latest ultimate off-road factory Jeep on the new JL chassis, has all of it with the exception of the CB radio, which is unfortunate since black bears are easier to come by on the Rubicon than cell service. Our iPhones are as useless out here as mechanical sympathy for our steed. "Don't even try it," says one of our trail guides as he watches me fish my device from my luggage. "There's no service until we get back to Tahoe." That's a big 10-4. Lake Tahoe's crystal blue waters and charming downtown are about 30 miles from the Rubicon's eastern most trailhead. It's our finish line.

The List: Best of proving grounds

Proving grounds are where automakers and enthusiasts alike go to push their vehicles to their mechanical limits. The Rubicon Trail, located in the Sierra Nevada, is the ultimate off-road test, while Germany's Nurburgring is a grueling 13 mile road and track course. Jessi and Patrick visit both iconic proving grounds in this "best of" compilation of The List. If you like what you see, stay tuned to watch the full episodes, or click here to go directly to our episode archive and pick out some of your own favorite moments of The List to revisit. The List #0004: Conquer the Rubicon Trail The List #0073: Drive the Nurburgring Have an RSS feed? Click here to add The List. Click here to subscribe to The List in iTunes. Click here to learn more about our hosts, Jessi and Patrick. BMW Jeep Off-Road Vehicles Racing Vehicles The List Videos Original Video