Looks like they are testing thoroughly as well. This is in regard to the engine used in the 2010 Baja 1000 race EcoBoost truck. If you have ever seen a Baja you know how they run those trucks.
To test its durability, it was put through the equivalent of 10 years – 150,000 miles – of harsh usage on the dynamometer. Then, it was installed in a 2011 F-150 to work as a log skidder in Oregon. If that wasn’t enough, it was used to tow a 11,300 pound trailer at high-speed NASCAR track and then to compete in a steep-grade towing competition, where it took place.
Only then was it installed, without modification, into the F-150 EcoBoost race truck for the grueling run. The truck crossed the finish line of the 1,061 mile desert race in just 38 hours and 20 minutes. Last yea, less than half of the competition, many with modified engines, finished the race.
here is a link
Baja 1000: Ford F-150 EcoBoost Race Truck Finishes in 38 Hours | Automoblog.net