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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.

Riding along in Ford's bonkers Fiesta ST Global RallyCross car [w/video]

The Mountune-worked Fiesta ST GRC does 0-to-60 mph in 1.9 seconds.
On any given day, and every single weekend, there's at least one parking in the country invaded by manufacturer and team trucks. The be-chromed beasts and their 53-foot trailers are slotted into rows, men and women decorate the lot with orange cones to mark the invisible tracery of a temporary track, cars get unloaded, crews fret over them. The ritual can be as beautiful as the sunrise to those with enthusiast hearts, but it's just as common.

2018 wrap-up, Ford Ranger and Mercedes A-Class | Autoblog Podcast #566

In the final Autoblog Podcast of 2018, Editor-in-Chief Greg Migliore is joined by Senior Editor Alex Kierstein and Associate Editor Reese Counts. They kick off the conversation by talking about a couple of hot new vehicles: the Ford Ranger and Mercedes-Benz A 220 4Matic. Then they round up the biggest stories of 2018 before helping a listener choose a new car in the "Spend My Money" segment. Thanks for listening, and happy holidays. The Autoblog Podcast will be back next year. Autoblog Podcast #566 Get The Podcast iTunes – Subscribe to the Autoblog Podcast in iTunes RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown Driving the 2019 Ford Ranger Driving the 2019 Mercedes-Benz A-Class 2018 news roundup The ups and downs of Tesla and Elon Musk Losing Sergio Marchionne and the arrest of Carlos Ghosn Lots of layoffs Trump and tariffs Spend My Money Feedback Email – Podcast@Autoblog.com Review the show on iTunes Related Video: