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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.

MotorWeek relives '80s coupes with Dodge Daytona, Ford Escort EXP

Get ready for a wave of nostalgia and the rapid realization of the huge progress in performance cars over the last 30 years. For its latest Retro Review, MotorWeek takes a look back at two, front-wheel drive coupes from the '80s that seem to have entirely vanished from the roads today. Both the 1986 Dodge Daytona CS and the 1986.5 Ford Escort EXP were considered affordable, sporty options in their day, but the passage of time hasn't been kind to either of their specs. The Daytona certainly looks the part of a performance machine with a body that's reminiscent of other '80s coupes, like the third-gen Chevrolet Camaro. However with 146 horsepower and 170 pound-feet of torque from a 2.2-liter turbocharged four-cylinder, acceleration wasn't exactly a strong suit. MotorWeek complained about copious torque steer, as well. The optional CS suspension upgrade package on this Daytona was apparently a nod to Carroll Shelby who was working with Dodge at the time. If anything, the Escort EXP withstands the test of time even worse. As a two-seat coupe, you might have expected Ford's engineers to really turn up the performance to fit the sporty image that the exterior conveyed. That didn't really happen, and depending on which model buyers ordered, they got either 86 horsepower with a 1.9-liter engine or the "high-output" version of that mill with 108 hp.

Autoblog Minute: Focus ST Tuner, Traffic Deaths, Audi EV SUV

Ford releases an upgrade kit for the Focus ST, 2015 shows a spike in traffic-related deaths, and the future of Audi is previewed. Autoblog's Greg Migliore recaps the week. Show full video transcript text [00:00:00] Ford releases an upgrade kit for the Focus ST, 2015 shows a spike in traffic-related deaths, and the future of Audi, here's a hint it's electric. I'm Greg Migliore, senior editor at Autoblog with these stories and more for your Autoblog Minute weekly recap. Own a Focus ST but suffer from horsepower envy in anticipation of the Focus RS? Not a problem. A $1,900-kit from the developers at Mountune will boost your hot hatch to 275 hp and 296 pound-feet of torque, when running on 93-octane fuel. Traffic fatalities in 2015 see the largest spike in decades. The report from National Safety Council cites more drivers putting in more miles, and distracted driving as contributing to the 14-percent hike in car-related deaths. Audi plans on releasing a fully electric SUV at the 2015 Frankfurt Motor Show. Those are the highlights from the week that was. Be sure to check in this Saturday for my complete weekly recap. For Autoblog, I'm Greg Migliore. Autoblog Minute is a short-form video news series reporting on all things automotive. Each segment offers a quick and clear picture of what's happening in the automotive industry from the perspective of Autoblog's expert editorial staff, auto executives, and industry professionals. Frankfurt Motor Show Audi Ford Driving SUV Electric Autoblog Minute Videos Original Video ford focus st