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Porsche 911 Turbo and Nissan GT-R Nismo star in World's Greatest Drag Race 4

We love Motor Trend's annual World's Greatest Drag Race video. Now back for its fourth appearance, the idea of lining some of the world's fastest cars up for a ten-wide, straight-line, full-throttle run is, well... it's pretty freaking badass.
The lineup this year boasts some impressively fast cars to be sure. The group of ten includes the following darlings: Alfa Romeo 4C, BMW i8, BMW M4, Chevrolet Camaro Z/28, Ford Fiesta ST, Jaguar F-Type R Coupe, Nissan GT-R Nismo, Porsche 911 Turbo S, Subaru WRX STI and, last but not least, the Volkswagen GTI. Give us any one of those for the weekend, and we're happy to take the keys.
It must be said though, that for a publication that draws as much water as Motor Trend does, there are some big cars that we might expect to be here instead. The Lamborghini Huracán or Ferrari 458 Speciale would have added some exotic flare to the list, and the omissions of the Chevy Corvette Stingray (for the second year in a row) and the Dodge Challenger Hellcat are real head-scratchers.

Chevy says not to look at the 2019 Silverado's fuel economy rating

The 2019 Chevy Silverado is hitting dealerships soon, and one of the most notable changes for the new full-size pickup is the addition of a 2.7-liter turbocharged inline-four. The engine replaces the naturally-aspirated 4.3-liter V6 in volume consumer models like the Silverado LT and promises more power, less weight and — most importantly — better fuel economy. The thing is, the gains in efficiency haven't been as dramatic as some might have hoped, especially when stacked up against competitors from Ford and Ram. As Automotive News reports, GM's response is a little murky. First, let's talk numbers. We're pulling all figures from FuelEconomy.gov, the official U.S. government source for fuel ratings. Fuel economy numbers on trucks vary greatly based on a number of factors. Bed and cab configuration play a part, but so does a four-wheel-drive system. You also have to factor in tires, transmissions, rear-axle gearing, hybrid systems and cylinder deactivation. Things like that can make the difference between best- and worst-in-class. The EPA's website doesn't give enough information a lot of the time, so there's really no easy way to compare apples-to-apples. First, take a look at the ratings for the 2019 Silverado. A 2.7-liter model with two-wheel drive is rated 20 city, 23 highway and 21 combined. That's both better and worse than a two-wheel drive 2018 Silverado with the 4.3-liter V6 (18 city, 24 highway and 20 combined). The updated 2019 Silverado with a 4.3-liter V6 has yet to be rated. With less weight and a smaller engine, many hoped Chevy would make bigger gains. It's unusual to see any decrease in a fuel economy metric these days. GM says that it's not done tuning the new 2.7-liter engine, so fuel economy could theoretically increase. Expanding further, a V8-powered 2019 Silverado (17 city, 24 highway and 19 combined) actually gets better highway fuel economy than a turbocharged four-cylinder powered truck in certain configurations, even if the latter has a better overall average. But that's only with two-wheel drive, the 8-speed transmission and cylinder deactivation. A Silverado with the 5.3-liter V8 and a 6-speed automatic is rated at 15 city, 22 highway and 17 combined. The biggest issue with the Silverado 2.7-liter doesn't come from within GM itself but from Ford and Ram. GM cites the Ford F-150 with the 3.3-liter V6 and the Ram 1500 with the 3.6-liter V6 as the closest competitors to its new 2.7-liter inline-four.

Uber releases fleet of self-driving vehicles to select few in Pittsburgh

Starting today, a select group of Uber users in Pittsburgh, PA will have the ability to request a self-driving vehicle. If a self-driving vehicle is in the area, Uber will send it, as well as a safety driver, to drive loyal customers to their destination. The announcement to give customers the opportunity to get a ride in one of Uber's self-driving vehicles comes roughly a year and a half after the company set up its Advanced Technologies Center in the city. On Tuesday, the company offered a few members of the press the opportunity to ride in one of the company's self-driving cars. The fleet, despite Uber's collaboration with Volvo, was comprised of 14 Ford Fusions equipped with a host of self-driving technology, reports TechCrunch. Uber is giving away free rides as a way to obtain real-world testing, which is crucial for self-driving technology. Recently, nuTonomoy beat Uber to the punch by launching the world's first autonomous taxis in Singapore. While the choice to release its self-driving cars in Pittsburgh mainly comes down to the fact that its ATC is located there, the city faces four seasons and its difficult streets that are comprised of bridges, railroad lines, and an irregular grid layout will prove to be a challenge for the autonomous cars. Since the self-driving vehicles are still being tested, the cars will come with two full-time Uber employees. One employee will loosely grasp the car's steering wheel, ready to take over if something goes awry, while the other will monitor the computer's software. As TechCrunch points out, Uber's autonomous vehicles drove in a similar manner to a regular driver. It obeyed traffic laws, mimicked a driver by coming to stops gently and at other times abruptly, as well as driving slightly into another lane to dodge a poorly-parked vehicle, reports TechCrunch. There's no word on whether regular Uber customers will get a ride in one of the company's Fusions or one of the Volvo's that its working on. Automakers and companies alike have been in a race to put autonomous vehicles on the road. Tesla recently updated its Autopilot system, Apple laid off dozens of employees to reboot its self-driving car project, and Google is working giving its autonomous vehicle the ability to detect emergency vehicles. While this is a large step for Uber, vehicles with autonomous capabilities still have a long way to go.