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An in-depth look at the Ford GT with Xcar

Ford made big waves when it unveiled the new GT at the Detroit Auto Show this past January. But as far as details go, it's been rather quiet. Though Dearborn has revealed what engine will sit between those buttresses, it hasn't told us exactly how many horses or torques it will produce, or precisely how fast we should expect it to propel the new all-American supercar. Fortunately, the automaker let the crew at Xcar into the studio to give us a quick, four-minute rundown of all the information that is out there at the moment, along with all the most intriguing angles of the vehicle's design. The historically savvy among us will already know that the new 2016 Ford GT traces its roots back to the GT40 that conquered Le Mans half a century ago, and through the previous Ford GT that debuted a decade ago. Both of those featured V8 engines (supercharged in the latter case) while their modern successor goes with a twin-turbo V6. But as Xcar points out, six cylinders aren't without their precedence in the history of the GT-series Ford supercar: the GT70 rally car of 1970 originally packed a 2.6-liter V6. That engine was later replaced by a 1.6-liter inline-four, which puts another crack in the theory of the eight's hegemony over the history of the series – as does, we'll point out, the Bugatti-like quad-turbo V12 that featured in the GT90 concept of 1995 that sadly never made production. The point is that divergence from V8 tradition shouldn't dissuade anyone from getting excited over the arrival of the new GT, and we're looking forward to seeing what she can do – on and off the track. Related Video:

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.

GM says it favors fuel-efficiency rules based on historic rates

WASHINGTON — General Motors backs an annual increase in fuel-efficiency standards based on "historic rates" rather than tough Obama era rules or a Trump administration proposal that would freeze requirements, according to a federal filing made public on Monday. The largest U.S. automaker said the Obama rules that aimed to hike fleet fuel efficiency to more than 50 miles per gallon by 2025 are "not technologically feasible or economically practicable." The Detroit automaker said that since 1980, the motor vehicle fleet has improved fuel efficiency at an average rate of 1 percent a year. Fiat Chrysler Automobiles NV said in separate comments that the auto industry is complying with existing fuel efficiency requirements by using credits from prior model years. As a result, even if requirements are frozen at 2020 levels, "the industry would need to continue to improve fuel economy" as credits expire, it added, warning if the government hikes standards beyond 2020 requirements "the situation worsens ... without some significant form of offset or flexibility." Fiat Chrysler and Ford urged the government to reclassify two-wheel drive SUVs as light trucks, which face less stringent requirements than cars. A four-wheel drive version of the same SUV is considered a light truck. Ford backs fuel rules "that increase year-over-year with additional flexibility to help us provide more affordable options for our customers." GM's comments said it was "troubled" that President Donald Trump's administration wants to phase out incentives for electric vehicles. The Trump plan's preferred alternative freezes standards at 2020 levels through 2026 and hikes U.S. oil consumption by about 500,000 barrels per day in the 2030s but reduces automakers' collective regulatory costs by more than $300 billion. It would bar California from requiring automakers to sell a rising number of electric vehicles or setting state emissions rules. The administration of former President Obama had adopted rules, effective in 2021, calling for an annual increase of 4.4 percent in fuel-efficiency requirements from 2022 through 2025. GM has been lobbying Congress to lift the existing cap on electric vehicles eligible for a $7,500 tax credit. The credit phases out over a 12-month period after an individual automaker hits 200,000 electric vehicles sold, and GM is close to that point.