I've completed all but 1 event... the Silverstone endurance on tab 5. I've raced both the 918 & 911. They're both fully upgraded. I've tried doing it the 10 second way and all out. The best I've been able to do is 13.2. Meanwhile the miles to beat has increased from 14.2 to 16.1 and is now at 18.2. Huh? Give me a break lol. Offline is prohibited so I'm at my witt's end. Don't know what else to try. Has anyone won it? Any advice would be greatly appreciated. Thanks!!