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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.

Ford forced to recall Escape over fire risk yet again

Recalls happen. Automakers hope they won't, but they do. And that's alright, for the most part, because cars are designed (and to a large degree still made) by humans, and humans make mistakes. So we forgive them, as long as the problem is resolved. Only in the case of the Ford Escape, the problem seems to keep coming back.
That's why Ford is calling in the Escape yet again due to fire concerns. The issue revolves around problematic fuel lines in 9,469 units manufactured between October 5, 2011, and July 11, 2012, all of which use the 1.6-liter EcoBoost inline four-cylinder engine.
As you yourself may recall, the Escape was subject to a string of recalls last year that resulted in a $17 million fine. One of them was over this very same issue, which Ford apparently didn't rectify the first time around. Let's hope this time is the last time.

Supercars for the win | Autoblog Podcast #515

Some days at Autoblog are better than others. And in this episode, we talk about those days. Specifically, the days where we get to drive supercars. Mike Austin, Greg Migliore, and Alex Kierstein join up in this episode to talk about driving the McLaren 720S, Ford GT, and Porsche 911 GT3. We also drove some less-super, but still notable cars that we talk about at the top of the show. And as always, we play the game Spend My Money where we get to tell readers what we'd do if we were them. We had a lot of fun with this one, we hope you enjoy listening to it. The rundown is below. Remember, if you have a car-related question you'd like us to answer or you want buying advice of your very own, send a message or a voice memo to podcast at autoblog dot com. (If you record audio of a question with your phone and get it to us, you could hear your very own voice on the podcast. Neat, right?) And if you have other questions or comments, please send those too. Autoblog Podcast #515 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 Topics and stories we mention Infiniti Q50 RS 400 Ram Power Wagon (again) Audi SQ5 Chevrolet Equinox Mini Cooper John Cooper Works Clubman Ford GT McLaren 720S Porsche 911 GT3 Used cars! Toyota 86 Rally Car Rundown Intro - 00:24 What we're driving - 01:26 Supercars! - 22:30 Spend My Money - 46:30 Total Duration: 57:30 Feedback Email – Podcast at Autoblog dot com Review the show on iTunes