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BMW M4 versus Audi RS5 | Autoblog Podcast #546

On this week's Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Associate Editor Reese Counts. We debate the merits of the BMW M4 and the new Audi RS5 and our hopes for the refreshed Mercedes-AMG C63. We also discuss the state of Cadillac, the future of the Ford Fusion and the rumored Mercedes-AMG competitor to the Porsche 718 Boxster and Cayman. Autoblog Podcast #546 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 2018 BMW M4 versus 2018 Audi RS5 Cadillac and Mercedes-AMG sport coupes The state of the luxury car industry The future of the Ford Fusion Replacement for the Mercedes-Benz SLC Feedback Email – Podcast@Autoblog.com Review the show on iTunes Related Video: Design/Style Podcasts Audi BMW Cadillac Ford Lexus Lincoln Mercedes-Benz Convertible Coupe Crossover SUV Luxury Performance bmw m4 mercedes-amg c63

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 offering $10,000 in incentives for new F-150

Not two months ago, Ford posted lower-than-expected first quarter earnings partly because of production issues with the new F-150, but raised the year's profit outlook thinking the production issues were over. A month later we got word of more manufacturing problems due to a shortage of frames, leaving the company unable to fulfill demand. The problems not only ate into Ford's bottom line, but also its market share, since the F-Series truck has been the best-selling vehicle for the past 33 years. Inventory still isn't where Ford wants it, and won't be until the end of September. The pipeline is stocked enough, however, that Bloomberg reports The Blue Oval is putting up to $10,029 on the hood in some parts of the country, and only on certain trims, as a way to stay competitive with rival truck makers. Ford lost 100,000 units of production during the changeover of the two plants that build it. The frame shortage compounds that, which has led to F-150 sales that are down 2.4 percent through the first half of the year. F-150 market share in June 2014 was 33 percent, this June it was 28 percent. Meanwhile, sales over at General Motors and Ram are climbing - Chevrolet Silverado sales were up 18 percent year-on-year in June. Ford said its incentive spending on the F-150 is down overall this year, and its average transaction price of $44,100 remains the highest in the segment. Still, it will look forward to solid footing to take on rivals. Related Video: