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Ford finds flex-fuel engine design plays big role in emissions output

How bad is ethanol for your engine? There's been a lot of debate on this issue as the US considers upping the biofuel content in the national gasoline supply from 10 percent (E10) to 15 percent (E15). The ethanol industry and some scientists say higher ethanol blends show no "meaningful differences" in new engines while the oil industry says ethanol creates health risks. Researchers working at the Ford Research and Innovation Center decided to take a closer look at how a wide range of gas-ethanol blends - E0, E10, E20, E30, E40, E55 and E80 - affected the emissions coming out of a flex-fuel 2006 Mercury Grand Marquis. To see the full report, printed in the journal Environmental Science & Technology, requires payment, but there is an abstract and Green Car Congress has some more details. The gist is that, "with increasing ethanol content in the fuel, the tailpipe emissions of ethanol, acetaldehyde, formaldehyde, methane, and ammonia increased." At least NOx and NMHC emissions decreased. The researchers say that the effects are due to the fuel and "are expected for all FFVs," but that the way that a manufacturer calibrates the engine will affect NOx, THC, and NMOG emissions. It's this last bit that's important, since the researchers found, "Higher ethanol content in gasoline affects several fundamental fuel properties that can impact emissions. ... These changes can have positive or negative effects that can depend on engine design, hardware, and control strategy. In addition to direct emissions impacts, higher ethanol content fuel can also provide more efficient combustion and overall engine operation under part-load conditions and under knock-limited higher-load conditions." So, as we head towards more ethanol in our fuel supply (maybe), manufacturers are going to need to learn how to burn it most efficiently.

2019 Detroit Auto Show Special | Autoblog Podcast #568

This week's Autoblog Podcast is a special one, recorded from Cobo Center in Detroit, site of the 2019 North American International Auto Show (NAIAS). Editor-in-Chief Greg Migliore is first joined by Senior Editor Alex Kierstein and Consumer Editor Jeremy Korzeniewski to talk about the Toyota Supra, Ford Shelby GT500 and Subaru STI S209. Then Senior Editor, Green, John Snyder and Associate Editor Joel Stocksdale join Greg to discuss the Nissan IMs Concept, new Ford Explorer and Kia Telluride, before going over the Editors' Picks for the best cars of the Detroit Auto Show. Autoblog Podcast #568 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 2020 Toyota Supra 2020 Ford Mustang Shelby GT500 2019 Subaru WRX STI S209 Nissan IMs Concept 2020 Ford Explorer (including ST and Hybrid) 2020 Kia Telluride Best in Show: 2019 Detroit Auto Show Editors' Picks Feedback Email – Podcast@Autoblog.com Review the show on iTunes Related Video:

2015 Ford F-150 to get up to 26 miles per gallon

The 2015 Ford F-150 is one of the most important US vehicle debuts in years, be it in the pickup segment or the entire marketplace. While we've already known about the truck's engine lineup, its payload ratings and we've even learned a bit about how it drives, the truck's EPA-estimated fuel economy ratings have remained a mystery. The wait is finally over. Ford has announced numbers that put the latest F-150 as the mileage leader among gasoline-powered, full-size pickups in the US, with its new 2.7-liter EcoBoost V6 topping the charts. Starting with the entry-level naturally aspirated 3.5-liter V6, the rear-wheel-drive F-150 is rated at 18-miles-per-gallon city, 25-mpg highway and 20-mpg combined. Opting for four-wheel drive drops those numbers slightly to 17/23/19. If fuel economy is your absolute priority, then upgrading to the 2.7-liter EcoBoost V6 is the hot ticket. It improves things further to 19/26/22 in rear-wheel drive trim or 18/23/20 with four-wheel drive. The carryover naturally aspirated 5.0-liter V8 is rated at 15/22/18 as a 4X2 or 15/21/17 as a 4X4. Finally, the flagship 3.5-liter EcoBoost V6 tops the range in available torque and offers buyers 17/24/20 ratings with rear-wheel drive or 17/23/19 with four-wheel drive. "We are delivering with the toughest, smartest and most capable F-150 ever – and now the highest EPA-estimated fuel economy ratings of any full-size gas-powered pickup in America," said Raj Nair, Ford group vice president, Global Product Development, in the company's announcement. Depending on engine and drivetrain configuration, Ford contends that the 2.7-liter EcoBoost's top rating puts fuel economy up between 5 and 29 percent over the current generation, thanks in large part to the truck's lighter aluminum construction. Obviously, these are EPA estimates, and your mileage may vary – ours has. Recently, Autoblog team members have had real difficulty even approximating government mpg estimates on many EcoBoost models, including the new F-150. Scroll down to read Ford's full announcement, including comparisons to rival models.