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Leno recalls '90s showdown with Tim Allen and his mullet

Not many of us have buddies with garages full of classic cars, but that isn't the case for Jay Leno and Tim Allen. Of course, one of the advantages for two guys with such vast collections is occasionally getting to pit their cars against each other. The two comedians did just that in the mid-'90s with a burnout battle on The Tonight Show between Allen in a race-prepped Mustang and Leno in a drag racer. After some time away from regular television, Leno is returning to the airwaves with a Jay Leno's Garage series premiering on Oct. 7 (tonight) at 10:00 p.m. ET on CNBC. Let this clip serve as another taste of what to expect for the new TV show's mix of comedy and cars. After reminiscing about the old days in a gorgeous garage, the comedians get into two modern machines to reprise the classic challenge – after a little trash talk anyway. Don't worry because the YouTube series isn't going anywhere, though.

2015 Ford Mustang earns Five Stars from NHTSA [w/video]

We already know that the latest Ford Mustang is a pretty potent pony car in terms of its performance potential, but according to the government, it's a safe choice too. The National Highway Traffic Safety Administration recently released its New Car Assessment Program crash test results for the 2015 'Stang coupe, and it came away with top five-star overall ratings in every evaluation. The Mustang received a five-star overall score and five stars for its frontal, side and rollover ratings. The only minor ding was a four-star result just for the backseat in a side barrier crash. According to NHTSA, "Although not included in the star rating, the rear passenger's thoracic rib deflection was elevated." You can check out the full NCAP evaluation, here. According to Ford, the latest Mustang has twice as many airbags and crash sensors as the outgoing model. NHTSA also likes that the pony car offers a rearview camera and forward collision warning – two of the technologies that the agency recommends buyers getting for added safety. Watch the car crash in the video below. 2015 MUSTANG EARNS HIGHEST VEHICLE SAFETY RATING FROM NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION National Highway Traffic Safety Administration awards the all-new 2015 Mustang a five-star Overall Vehicle Score in its New Car Assessment Program All-new Mustang has twice as many airbags, twice as many peripheral crash sensors and additional pretensioning safety belt technology compared to the outgoing model The new Mustang is the first car to offer four-, six- and eight-cylinder engines that each produce at least 300 horsepower – a 300-horsepower 3.7-liter V6, a more powerful 435-horsepower 5.0-liter V8, and an all-new 310-horsepower 2.3-liter EcoBoost® engine DEARBORN, Mich., Feb. 11, 2015 – The 2015 Ford Mustang received a top safety rating from the National Highway Traffic Safety Administration (NHTSA). The 2015 Mustang earned a five-star Overall Vehicle Score in NHTSA's New Car Assessment Program (NCAP) testing. The New Car Assessment Program is the National Highway Traffic Safety Administration's evaluation program for new vehicle designs established to test for performance against safety threats. Now on sale at Ford dealers, the all-new 2015 Mustang received five stars in the frontal crash test, five stars in the side crash test and five stars in the rollover crash test. "The new Mustang was built from the ground up," said Carl Widmann, Mustang chief engineer.

The tricky business of octane, power, and MPG

Given tepid green-car sales numbers this year, consumers in the US aren't making the transition away from internal combustion engines too quickly. Regulations are still mandating cleaner emissions, though. In addition to downsizing and turbocharging, there's growing consideration about moving to higher-octane fuel to improve overall efficiency. In a new report, engineers at FCA, Ford and General Motors Powertrain are showing that it could work, too. The major advantage to higher-octane fuel is that it supports higher compression ratios. That in turn can lead to more power from burning the same amount of gas. "Higher ethanol content is one available option for increasing the octane ratings of gasoline and would provide additional engine efficiency benefits for part and full load operation," the researchers write in the study's abstract. The authors even think it could be possible to update some modern vehicles' engine calibration to be optimized for the better gas. While the benefits are there, we still have a long way to go before higher-octane fuel becomes a national standard. According to Green Car Congress, 87 percent of the gas sold in the US is regular grade 87-octane. Meanwhile, premium 91-93 octane makes up just 10 percent. The various grades of fuel illuminate even more annoyances with the current system. For example, Ford generally recommends 93-octane for EcoBoost engines, and the power outputs that the company publishes are based on using it. However according to Green Car Reports, such premium gas is very difficult to find in some regions of the US, especially along the West Coast. The powertrains still run on lesser grades but with lower power output. The researchers' discussion of possibly increasing ethanol in gas also comes during a heated debate on the substance. The current administration is pushing for less of the corn-based fuel in the coming years. Although, several presidential hopefuls might be favor of reversing that course.