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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.

Cheap gas has Ford investors nervous over 2015 F-150

Gasoline in the US continues its weeks-long descent with prices down about 13 cents a gallon over last week to $2.544, which is lower by around 69 cents/gallon from this time last year, according to the US Energy Information Administration. Many drivers are welcoming the lower bills at the gas station as a fantastic holiday gift, but Ford investors are somewhat spooked over the potential sales implications for the 2015 F-150. Market analyst Rod Lache of Deutsche Bank recently downgraded Ford's stock from a buy to hold, according to TheDetroitBureau.com, and his report to investors may have played a part in a drop in the company's share price. Lache praised the truck's powertrain and lightweight technology, but wrote, "We question whether consumers will pay the price for this content with $2-$3 gas," in his report, according to the website. Whether buyers actually turn away from the F-150 is mostly speculative at this point because it only recently began production. With around 700 pounds of weight loss thanks in parts to its new aluminum parts, the latest Ford pickup offers up to 26 miles per gallon on the highway, plus segment-best payload and towing ratings. Prices are up somewhat in part to pay for additional standard features, though. Still, any further dip in Ford's stock is bad news this year. According to TheDetroitBureau.com, the company's shares are down about 7.5 percent this year. On December 15, the price fell to $14.28, the lowest since November 10. Related Video:

Driving Civic and Elantra Hybrids, and big Ford Maverick updates | Autoblog Podcast #842

In this episode of the Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Road Test Editor Zac Palmer. They discuss the week in car news first, leading off with the updated 2025 Ford Maverick that adds a Lobo sport truck variant and an AWD hybrid. Next, they chat some Cadillac news with the reveal of the stunning Sollei convertible concept and the refreshed 2025 Escalade. After the news, the two focus on what they've been driving over the past couple of weeks. They start with the Fiat 500e, then move along to a comparison between the refreshed Hyundai Elantra Hybrid and totally-new Honda Civic Hybrid. Lastly, there's a discussion of the new Infiniti QX80 and the STI mods applied to our long-term Subaru WRX. Send us your questions for the Mailbag and Spend My Money at: Podcast@Autoblog.com. Autoblog Podcast #842 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 News 2025 Ford Maverick Lobo 2025 Ford Maverick adds AWD hybrid version Cadillac Sollei revealed 2025 Cadillac Escalade refresh What we're driving 2024 Fiat 500e 2025 Honda Civic Hybrid 2024 Hyundai Elantra Hybrid 2025 Infiniti QX80 Long-Term 2023 Subaru WRX 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:  Cadillac Sollei is an electric convertible concept This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.