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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.

2023 Detroit Auto Show Editors' Rankings

The 2023 Detroit Auto Show was back in its traditional location, though in its fall spot in the calendar, and it was another pretty quiet event. By our count, only five new models, or model lines, were revealed and brought to the floor; all of which came from Detroit's own car companies. Still, some of them were quite significant, and the types were diverse. Naturally, we also had our favorites. So take a look to see how we ranked the reveals of the Detroit Auto Show. 2025 Cadillac CT5 View 15 Photos 5. 2025 Cadillac CT5 The refresh for the 2025 Cadillac CT5 is no great revelation, because it doesn’t have to be. An already solid, attractive design means only light tweaks were made to its appearance, and the new front fascia and redesigned lights just make the CT5 just that much more aggressive. So what was missing from the current model? Apparently, the answer was a gorgeous 33-inch curved LED display serving as both infotainment and instrument cluster. It has touchscreen capability to both the right and left sides of the steering wheel, and provides 9K resolution. Update some of the safety and driver assist tech, and — boom — the CT5 is properly modernized. Now bring on the updated Blackwing. –Senior Editor, Green, John Snyder 2024 Jeep Gladiator Live View 10 Photos 4. 2024 Jeep Gladiator Jeep carved out plenty of time for what is essentially a no-brainer mid-cycle refresh, but thereÂ’s one among us who is easily swayed: Me. I dumped the maximum number of points allotted on the 2024 Gladiator with only three words of explanation: "I like Jeeps." But this is kind of a big deal. The Gladiator pulled a lot of weight for Stellantis during the pandemic by providing an alternative to pickup buyers while Ram dealers were scraping the bottom of the supply barrel. To be fair, we're probably giving the Gladiator a bit of advance credit here for its promise to deliver a 4xe variant in 2025, but who else is talking about their PHEV pickup plans? Your move, Ford. –Associate Editor Byron Hurd. 2024 GMC Acadia AT4 View 17 Photos 3. 2024 GMC Acadia The 2024 GMC Acadia is the one reveal from this yearÂ’s Detroit Auto Show that was actually a totally new vehicle, and as far as three-row SUVs go, GMC aced it. The exterior has its own personality separate from its Chevrolet Traverse twin. Its AT4 trim is legit with more ground clearance, a torque-vectoring rear diff and sweet orange marker lights on the fenders.

Weekly Recap: Toyota propels hydrogen fuel cells

Toyota is serious about hydrogen fuel cells, and it wants the auto industry to follow suit. The Japanese automaker said this week it's releasing 5,680 fuel cell patents from around the world, including technologies used on its upcoming sedan, the 2016 Mirai. The move is unusual, but not unprecedented, as Tesla similarly released its electric vehicle patents last year. The idea for Tesla, and now for Toyota, is to spur development of alternative propulsion. "By eliminating traditional corporate boundaries, we can speed the development of new technologies and move into the future of mobility more quickly, effectively and economically," said Bob Carter, Toyota Motor Sales senior vice president of automotive operations, in a statement. Toyota's fuel cell patents will be free to use through 2020, though patents related to producing and selling hydrogen will remain open forever. Toyota said it would like companies that use its patents to share their own hydrogen patents, but won't require it. "What Toyota's doing is really a logical move, and really a good move for the industry," Devin Lindsay, principal powertrain analyst with IHS Automotive, told Autoblog. The announcement was made at the Consumer Electronics Show in Las Vegas. It comes as Toyota prepares to launch the hydrogen-powered Mirai in a limited number late this year in California. The launch will be extended to the Northeastern United States next year. Toyota also has announced plans to support networks of fueling stations in each region to try to smooth consumer adoption. The Mirai has a 300-mile range on a tank of hydrogen, and it takes about five minutes to refill. Fuel cells have been receiving increased attention recently, and Audi and Volkswagen debuted hydrogen-powered cars at the 2014 Los Angeles Auto Show. Honda, another proponent of the technology, also showed its updated FCV concept in November in Japan. The company, however, has delayed its fuel cell sedan a year until 2016. Like Toyota, Honda says its hydrogen-powered car will have a range of 300 miles or more. Meanwhile, Hyundai currently offers leases for fuel-cell powered Tucsons, which have a 265-mile range, in Southern California. Despite the optimism some automakers have for fuel cells, the technology still faces barriers. A lack of filling stations has long held it back, and many consumers are not familiar with the potential benefits.