I believe each team is allowed only a limited number of engines to last the entire season. So by the last race, all the engines will be pretty worn. The chances of engine failure must be much higher than earlier in the year. A rider can use an extra engine but is penalised by having to start from the back of the grid. If that is correct, I wonder if it means Rossi will be starting the race with a fresh engine but Lorenzo with a clapped-out one?
