How bad is ethanol for your engine? There's been a lot of debate ... E55 and E80 - affected the emissions coming out of a flex-fuel 2006 Mercury Grand Marquis. It's this last bit that's important ...

Even beyond muscle cars, large Ford engines power heavy-duty trucks like the F-1100, showcasing the brand's varied expertise.

310.0-hp, 5.4-liter, 8 Cylinder Engine (Flex Fuel Capability) $1,070 Starting MSRP Wondering which trim is right for you? Our 2011 Ford Expedition trim comparison will help you decide.

The well-regarded Ecoboost engine family ... likes of the Ford Flex, Ford Taurus SHO, and Lincoln MKT. Like the rest of the Ecoboost lineup, it combines turbocharging and direct fuel injection ...