2007 Ford Explorer Sport Trac Xlt Crew Cab Pickup 4-door 4.0l 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.

Ford Fiesta banned from SCCA autocrossing because of rollover risk

Autocross can be a great way to break into motorsports, especially at SCCA events that allow run-of-the-mill, street-legal vehicles to be run through the cones in parking lots across the country. But while a wide array of vehicles are eligible, not every one is. And now the Ford Fiesta has been removed from the list of qualifying vehicles in the Sports Car Club of America's Street category for solo events. The removal of the Fiesta was publicized in the latest issue of the SCCA's Fastrack News bulletin, which stated that, due to roll-over risk, Fiestas "do not meet the requirements and are to be removed" from the HS category of eligible vehicles. H Stock (or HS for short) is the lowest category of vehicles certified by the SCCA for use in sanctioned events. The disqualification applies to Fiestas from the 2011 model year onwards, and does not apply to the Fiesta ST, which remains eligible. Of course the Fiesta isn't the only model deemed ineligible for SCCA autocross events. According to Jalopnik, other small hatchbacks and crossovers including the Dodge Caliber, Fiat 500, Scion xB and iQ, Nissan Juke and Mini Countryman are also prohibited from competition. We've reached out to both Ford and the SCCA for clarification on the issue, and will issue an update if and when we receive any substantial information.

Autoblog Podcast #327

New York Auto Show, Jim Farley interview, 2014 Chevrolet Silverado fuel economy, Ford fuel economy app challenge
Episode #327 of the Autoblog Podcast is here, and this week, Dan Roth, Zach Bowman and Jeff Ross talk about this year's New York Auto Show, Chevrolet's latest assault in the pickup truck fuel economy battle, and Ford's reward for developing a better fuel economy app. Dan also has an interview with Ford's Jim Farley about the future of Lincoln. We wrap with your questions and emails, and for those of you who hung with us live on our UStream channel, thanks for taking the time. Keep reading for our Q&A module for you to scroll through and follow along, too. Thanks for listening!
Autoblog Podcast #327: