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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.

Dodge Charger SRT Hellcat in the works

In Autoblog's recent First Drive of the 2015 Challenger SRT with the 707-horsepower Hellcat V8 we found its engine to be as brutally powerful as the numbers would suggest, even if it wasn't the best handler. However, the muscle-car-styling just isn't right for some buyers that need four doors and proper rear seats to haul around the family. It appears that Dodge has their backs, though, because the Hellcat is very likely on its way into the Charger in the near future. Imagine the looks on your passengers' faces when you stomp down on the throttle.
According to Road and Track, when Dodge submitted the Hellcat for engine power certification to the Society of Automotive Engineers, the company included the Charger on the paperwork. That showed that the automaker wanted the engine checked out for the sedan, too. R&T reckons the 707-hp Charger would hit the road about a year from now, clearing the Challenger for a year of exclusivity with the powerplant.
When the Charger SRT Hellcat does hit the road, it may carry a very special accolade. Assuming nothing beats it in the meantime, it might be the world's highest horsepower production sedan. Think on that for a second. Even a Mercedes S65 AMG only has 621 horsepower, though a good bit more torque at 738 pound-feet to the Dodge's 650 lb-ft. So while the beastly engine is getting put into other models, where else would you like to see it? The Ram? Grand Cherokee? Let us know in Comments.

Diesel Power finds the ultimate modified oil-burner

For nine years, Diesel Power magazine has run the Diesel Power Challenge, this year's grindfest being "a week-long torture test that features seven events, nine trucks, 8,000 horsepower, and nearly 15,000 pound-feet of torque." The road to being crowned "the most powerful truck" starts with a dyno run, and then continues through the completion of a CDL-style obstacle course, an eighth-of-a-mile drag race while towing a 10,000-pound trailer, a quarter-mile drag race without a trailer, a fuel economy test in the mountains and finally a sled-pulling test through a 300-foot-long packed-mud pit.
What kind of trucks get into such a fight? Last year's winner, for instance - who upgraded his truck this year to prove he didn't "luck into the win" - drives a 2008 Ford F-250 Super Duty with a 6.4-liter Power Stroke V8 upgraded with a custom intake, Elite Diesel triple turbos and a two-stage nitrous system. Another competitor has a 2005 Dodge Ram 2500 powered by a 5.9-liter Cummins inline-six, upgraded with Garrett turbos, dual-stage nitrous, a seven-inch exhaust stack and twin fans built into the bed to cool the Sun Coast Omega transmission. The numbers on that truck: 1,255 horsepower, and 2,063 pound-feet of torque at the wheels. Naturally, as the image above might suggest, things don't always end well.
You'll find all five videos covering this years challenge below. A scene in the dyno video sums it all up perfectly: a competitor leaves his nitrous on too long and the crew is treated to some ominous poppings, he leans out the window, throws both hands up and shouts, "Amer'ca!"