2010 Ford Fusion Sel on 2040-cars

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2015 Ford Mustang Convertible makes inappropriate appearance in Detroit [w/video]

With the polar vortex fresh in the minds of Autoblog's Detroit-based staff, we're finding it funny that any manufacturer would choose January in the Motor City to show off a new and highly anticipated convertible to the general media and public for the first time. But Ford has done just that, giving us our first real peek at the new Mustang Convertible in the flesh.
The new Mustang Convertible is more or less unchanged from the standard coupe, with some subtle styling tweaks to accommodate the retractable soft top. Engine and transmission choices are identical to the hardtop, although we should expect slightly lower performance due to the hardware for the roof. Like the coupe, neither prices nor performance metrics have been published yet for the convertible.
Hop up top for our live gallery of images from the floor of the Detroit Auto Show.

Toyota Camry, Honda Civic inventories mounting as US automakers make inroads

Two of the hottest-selling cars in America aren't quite as hot as they used to be. The Toyota Camry and Honda Civic are both seeing dealer supplies increase in the face of renewed competition from the much-improved Detroit Three.
According to a report from The Detroit News, the Camry's dealer inventory is 15 days higher than its seasonal average, while the Civic is 25 days above average. Things aren't expected to get better for Toyota and Honda, as RBC Capital Markets analyst Joseph Spak marked the two Japanese offerings as "at risk for reduced output."
The Detroit Three, meanwhile, are seeing supplies dwindle as demand increases, especially for the Ford Fusion, which has seen an 18-percent increase in 2013 sales, and the Chevrolet Cruze, which was second only to the Camry in June 2013 sales.

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.