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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.

2015 Gordon McCall's Motorworks Revival

Considered the big kick off of the major festivities surrounding Monterey Car Week, this year's Gordon McCall's Motorworks Revival certainly didn't disappoint. For those unable to make it to the California coast, our own Drew Phillips was on hand to snap some of the beautiful vehicles on display for this gorgeous gallery. Held annually at the Monterey Jet Center, the event is always a feast for the eyes by collecting planes, a gang of exotic supercars, and some the top cars crossing the auction block over the coming days, like a Plymouth Hemi 'Cuda convertible. The Ford GT both new and old was a major attendee at this year's party. Among them, the Petersen Museum brought along an original racecar and a GT40 MKIII to promote an upcoming exhibit. The classics were complimented by the latest version that has continued to keep tongues wagging. The GT wasn't the only classic with a modern update there. Singer used the posh event for the North American debut of its stunning restoration of the Porsche 911 Targa. Shelby American was also at the revival for the public unveiling of the 50th Anniversary Daytona Coupe. On the more modern front, Honda was in attendance with the future NSX and one of the McLaren F1 cars that the company's engine powers. For further proof of the ritzy folks that attend this soiree, Pagani and Koenigsegg both had stands to show off their extremely quick wares.

Recharge Wrap-up: Tesla considers Model III SUV and wagon, Ford tears Tesla apart

Worries over Brazil's electric grid mean EVs are excluded from green car incentives. As part of a new efficiency program, non-plug-in hybrids will be eligible for a reduction in import duties, while EVs and plug-in hybrids will not. Brazil's government is concerned that the country's grid lacks the capacity to handle the increased load from an influx of EVs. Brazil plans to create a new incentive program - perhaps a more inclusive one - when the current one expires at the end of 2015. Read more at Green Car Reports. Tesla could make SUV and wagon derivatives of the upcoming Model III sedan. Tesla's VP of engineering, Chris Porritt, told Auto Express that to reach as many customers as possible, Tesla would consider all its options. "SUVs, estates - who knows?" says Porritt. He also says that while the company is currently focused on products with a broader appeal, another Roadster or other sports car aren't out of the question in the future. Read more at Auto Express. Ford admits to a Tesla Model S teardown. Ford CEO Mark Fields says that after disassembling, reassembling and driving the model S, his company is "very familiar with that product." He also says the Ford has the capability to build a similarly high-tech, long-range electric car. The questions still remains if Ford has plans for such a vehicle, but Fields says that it fits within Ford's "product philosophy." Read more at Business Insider and at USA Today.