I just finished the GR1 1 hr Endurance race easily on first try. I'm wondering why I had zero trouble with the AI not even second place. Usually the AI will get boost if your going too fast and smoke your fastest lap. My setup was using the Audi R18 TDT 11 with 941hp, 1174 tq, 1746lbs and racing soft tires. I used normal fuel pit every 7 lap tires and got fuel every other pit. Im guessing since I was was too Op the AI didn't even try because it didn't even beat my fastest lap and I won by 57 seconds.