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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.

Recharge Wrap-up: Ford 1.0L EcoBoost a hit in Europe; Build a tiny inverter, win $1 million

In Europe, Ford's 1.0-liter EcoBoost engine is the best-selling turbocharged gasoline engine. The three-cylinder motor powers 20 percent of new Fords sold in Europe. Earlier this year, it won its third International Engine of the Year award, and between January and June, it was sold in about 120,000 cars. So far this year, 38 percent of Fords sold in the Netherlands, 35 percent in Denmark and 32 percent in Switzerland have been powered by the 1.0-liter EcoBoost. The engine's turbocharger spins at 248,000 rpm, and provides 24 psi of pressure. The engine produces up to 138 horsepower, depending on the version. Read more in the press release below. When lithium-ion battery packs are retired from the road, remanufacturing, repurposing, and recycling are worthwhile options, according to a study by Mineta Transportation Institute. The study included a cost-benefit analysis of those three options, and found remanufacturing to be the best route. To get the most out of them, batteries should be tested and have their damaged cells replaced then put back to use. Repurposing is the second best option, using the remaining available charge for something besides cars. Recycling on its own isn't profitable, but it could make economic sense with "increased technological breakthroughs." Learn more at Recycling International or download the report here. A smaller inverter for EVs can win you $1 million. The Little Box Challenge is an open competition to build a power inverter with a density of at least 50 watts per cubic inch. Google and the Institute of Electrical and Electronics Engineers (IEEE) are offering the hefty prize to the team that builds the inverter with the highest power density within an enclosed volume of 40 cubic inches. Teams must register by September 30. Read more at Green Car Congress or learn more at the Little Box Challenge website.

Rolls-Royce Cullinan, Mercedes-AMG E 53 and BMW 2 Series | Autoblog Podcast #734

In this episode of the Autoblog Podcast, Editor-in-Chief Greg Migliore and Senior Editor, Consumer, Jeremy Korzeniewski kick things off with a discussion of the Rolls-Royce Cullinan and the future of the brand. The Mercedes-AMG E-Class is next up, followed by the BMW 2 Series Coupe.  Next, Senior West Coast Editor James Riswick reports from the ground at the first drive of the latest Honda HR-V. Our hosts revisit the week's news, including automakers requesting a lift of the EV federal tax credit cap, Chevy giving us a peek at its electric Blazer, and Ford recalling millions of vehicles, including about half of all the Mustang Mach-E EVs it has sold. Finally, our guys dig through the mailbag to help a reader decide whether to purchase a Ford Focus ST or another hot hatch. Send us your questions for the Mailbag and Spend My Money at: Podcast@Autoblog.com. Autoblog Podcast #734 Get The Podcast Apple Podcasts – Subscribe to the Autoblog Podcast in iTunes Spotify – Subscribe to the Autoblog Podcast on Spotify RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown Cars we're driving Rolls-Royce Cullinan Mercedes-AMG E 53 BMW 2 Series Coupe Dispatch from the 2023 Honda HR-V first drive event GM, Ford, Toyota, Stellantis CEOs want EV tax credit cap lifted 2024 Chevy Blazer EV partly revealed, details coming in July Ford recalls Mustang Mach-E, includes stop-sale order Ford recalls 3 million other vehicles Spend my money Feedback Email – Podcast@Autoblog.com Review the show on Apple Podcasts Autoblog is now live on your smart speakers and voice assistants with the audio Autoblog Daily Digest. Say “Hey Google, play the news from Autoblog” or "Alexa, open Autoblog" to get your favorite car website in audio form every day. A narrator will take you through the biggest stories or break down one of our comprehensive test drives. Related video: