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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.

Porsche Cayman GT4 speeds back into view

We're all familiar with the succession of numbers that follow the letters GT on a hard-core Porsche 911: the GT1 that was Stuttgart's Le Mans contender in the late 90s, the GT2 that packs turbochargers but without the Turbo's all-wheel drive and excess weight, and the naturally aspirated GT3 that's the enthusiast's choice. But a GT4? That's something new, and exactly what Porsche has in store.
Spied testing in Germany once again is the upcoming GT4 version of the Porsche Cayman, set to supersede the existing GTS and take the place of the previous Cayman R at the top of Porsche's junior sports car range. This latest batch of spy shots doesn't show us much more than the last crop, but gives us a much clearer view at what promises to be the most hardcore Cayman to date.
As you can see, the Cayman GT4 packs a much more aggressive aero kit and rolling stock than any version we've seen to date. It's got a lip spoiler, big air dam and GT3-style vent in front of the hood, deep air scoops along the flanks, a set of spindly alloys packing oversized brakes, a diffuser with twin central exhaust tips around back and a rear wing that's likely to be replaced with a sleeker unit before the GT4 reaches production.

Jay Leno plugs himself into Porsche's 918 Spyder

As one of the greatest sports car manufacturers of all time, when Porsche puts out a new, ultra-exclusive hypercar, enthusiasts tend to stand up and take note. Jay Leno is no exception, and now, the funnyman is finally getting his time with awesome 918 Spyder.
With his 1963 Porsche 356 and his 2005 Carrera GT flanking a Liquid Silver 918, Leno takes us through the basics of this plug-in hybrid roadster alongside Daniel Eastman of Porsche North America. Following the chat, Leno and Eastman take the German-plated car through the streets of California, testing it in a number of modes and even going on a short, all-electric freeway cruise.
If you're looking to learn more about the 918, or to just here its glorious gas engine at work, you'll want to scroll down and take a look at the latest episode of Jay Leno's Garage.