I did change the oil at the recommended intervals. However, the turbos aren't cooled with oil. Per a Ford press release:
"The EcoBoost approach eliminates several customer worries from previous turbocharger applications. Designed for long-life reliability, EcoBoost's turbochargers feature water-cooled bearing jackets. This architecture is designed to prevent oil "coking" that could occur in previous-generation turbochargers. The new design means that EcoBoost drivers don't need to observe special operating precautions, such as idling the engine before switching it off. The turbochargers are designed for a life cycle of at least 150,000 miles or 10 years."
I don't think an extended warranty would have helped with this becuase I'm at 106,000.