Kevin O. wrote:
I have read about a few people having this issue due to the direct injection and mostly because they push there oil change intervals to 7500+ miles. I change my oil every 4000 miles just to be safe. It's been a little over 2 years and 30,000 miles and she runs just as good now as she did the day I took her home. Ford in my opinion has hit a home run with the ecoboost engines and from there sales #'s they must be doing something right!! ;)
^ this. GM decreased their OCI due on DI engines due to this very issue.