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40+ cars that barely avoid the gas guzzler tax

The Gas Guzzler schedule, with mpg ratings and charges that haven't changed since 1991, lays out which fuel-swillers owe what to Uncle Sam.
I started thinking about the "Gas Guzzler Tax" - considerably less well known as The Energy Tax Act of 1978 - when I was driving Dodge's new Challenger SRT Hellcat last week. Unsurprisingly for a car that can burn 1.5 gallons of gas per minute at max tilt, theoretically able to empty a full tank of premium in about 13 minutes, the Hellcat will be subject to the Gas Guzzler Tax schedule when it goes on sale.

Jay Leno puts carbon fiber wheels to the test on a Porsche 911 GT3 RS

Jay Leno's Garage usually focuses on looking at cars new and old, speaking to their owners and then Jay taking a drive to see what he thinks. However, Leno throws his usual shtick to the curb this week to do a full product test of the carbon fiber wheels from a company called Carbon Revolution. If you're not interested in hearing about wheels for 18 minutes, don't worry. They get mounted on a Porsche and are tested back-to-back with stock wheels, and Leno takes the 911 for a track test, too.
While carbon-fiber wheels aren't exactly a new idea, Carbon Revolution's goal is to create a lightweight, one-piece product that can be mass produced. The company even claims that it already has a deal with an OEM automaker to offer them on a vehicle in a few years. The key to the technology is that it doesn't need an expensive autoclave to be made.
In the meantime, the company's carbon fiber wheels are available as an aftermarket option for about $15,000 a set, according to the video. They weigh in at about 15.5 pounds each and offer OEM-levels of stiffness, so they could cut some unsprung mass off of a performance car. Watch here as Jay and his mechanic Bernard lap Willow Springs and give their feedback about what they think of this cutting-edge technology.

Listen to the Porsche Macan's exhaust note ahead of its LA debut

As if we need further proof that the Porsche Macan won't just be another small CUV, it'll be a small Porsche CUV, the German automaker has released a video of the vehicle's raucous exhaust note. In short, the Macan will sport a far racier soundtrack than most of its competitors.
The raspy sound coming from one of the Macan's two turbocharged V6 engines sounds great (the video isn't clear as to whether we're listening to the base 3.0-liter or the Turbo model's 3.6-liter engine), and it's accompanied by a nice crackle on overrun. It isn't like a 911 or other flat-six model, but it is more or less what we expect a Porsche to sound like. We'll have all the details on the newest member of the Porsche lineup when it debuts later this month at the 2013 Los Angeles Auto Show. Scroll down for an official press release from Porsche, as well as the video of the Macan, and be sure to turn your speakers up.