Last song of the engine

Whether you know through, what is the time the engine can "catch a wedge"? This year we will find out it together with participants of a American Spirit meeting. We have a car from which we will let out all oils and liquids. We will start the car and we will allow it to work while the engine will jam or he will explode. Participants of a American Spirit meeting will be able to think of time, how many will sustain a engine , the most exact forecast will be rewarded.
The engine will sing the last song in the first day of a meeting, on July 26 19:30.