2014 Ford F150 Xlt on 2040-cars

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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.

2014 Ford Fiesta gets fuel economy bump to 41 mpg

The 2014 Ford Fiesta is in showrooms now with refreshed styling and new performance ST model, but it's what isn't yet available that should help the Fiesta stand out from the growing crowd of subcompacts. Aside from the new 1.0-liter EcoBoost model coming later this year, Ford recently told us that a new Fiesta SFE trim level is on the way that should put the updated Fiesta at the top of its class for fuel economy.
The new Fiesta SFE will hit an estimated 41 miles per gallon on the highway when equipped with the six-speed automatic transmission. The current listing on fueleconomy.gov shows the 2014 Fiesta getting up to 29 mpg city and 39 highway, but the SFE will get minor aero tuning and a recalibrated engine controller to help bump the highway figure past rivals like the Chevrolet Sonic and Nissan Versa - both of which top out at 40-mpg highway. There's still no word as to when the small 1.0-liter EcoBoost will show in the US, but Ford has indicated that engine's fuel economy isn't expected to be released until October.

Caddy XT4, Subaru STI Type RA, and blazin' Elon | Autoblog Podcast #553

On this week's Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Senior Editor Alex Kierstein and Green Editor John Snyder. We talk about time spent with the Cadillac XT4 and Subaru WRX STI Type RA. Then we get into other topics, including the death of the VW Beetle, our thoughts on the state of the Nissan 370Z, cameras replacing mirrors, the trouble with the Ford Focus Active, and Elon Musk blazing a fat blunt. We indulge in a little conversation about the process of writing about cars. Finally we help a listener choose their next EV in the "Spend My Money" segment.Autoblog Podcast #553 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 Cars we've driven: Cadillac XT4 and Subaru WRX STI Type RA RIP, VW Bug What's up with the Nissan 370Z? Lexus to replace side mirrors with cameras RIP, Ford Focus Active You do you, Elon On writing about cars Spend My Money: electric edition Feedback Email – Podcast@Autoblog.com Review the show on iTunes Related Video: Green Podcasts Cadillac Ford Lexus Nissan Subaru Tesla Volkswagen Car Buying Technology Coupe Crossover Electric Police/Emergency Sedan cadillac xt4 subaru wrx sti type ra