Whoopsy:

A big part of the race as actually won in the pits. The Porsche crew were consistently 5-6 seconds faster than the Audi crew, that's almost half a lap of advantage over the course of the race. Something to do with the car's layout, left hand drive vs right hand drive.

 

This is one of THE major reasons for the victory. Porsche could do 14 lap stints, but chose to do 13. This meant that there was more fuel left in the tank  when they came in for a refuel; thus the shorter time needed to top-up. A very clever strategy and beautifully executed. Hopefully the drivers took the pit crew to dinner.