I checked autotrader when I was looking a while back, you can't find 4cyl Edges with over 200k. They are DOA by then is my conclusion. Plenty of 3.5s with over 200k though.
Then you've got this, which reinforces my feeling that automakers are putting hopped up 4cyl engines in big heavy SUVs to hit EPA numbers - and those engines won't last. I want to say those engines are fine for compact up to mid size sedans, but I'm starting to see *tiny* displacement turbo engines in small - mid size.
http://www.jdpower.com/press-releases/2014-vehicle-dependability-study
"Increased Engine and Transmission Problems Contribute to Decline in Vehicle Dependability for The First Time in More Than 15 Years ""The decline in quality is particularly acute for vehicles with 4-cylinder engines, where problem levels increase by nearly 10 PP100. These smaller engines, as well as large diesel engines, tend to be more problematic than 5- and 6-cylinder engines, for which owners report fewer problems, on average."
...
"However, while striving to reduce fuel consumption, automakers must be careful not to compromise quality. "
