I participated in a group practice session hosted by an online league which was followed by mini races. The car was F1 and track was Yas Marina. Almost everyone including me had prepared set ups prior to the practice and we all started practice with those set ups. From the beginning of the practice session for about 3-40 minutes I was 0.4 sec behind lap leader and 3rd fastest. However as the track was getting rubber up and by 1 hour mark, I was pushed down with middle with 1.0 sec from a leader and at the end of the 2 hour session, I was 2nd from the slowest and 2 sec spread with the fastest lap. I was surprised that while I only made 0.4 sec improvement in the 2 hours, other drivers made 1-3 sec improvements. I noticed that they kept exiting the server and spent 5-15 minutes outside then came back in and drove again and repeated this consistantly throughout the session. Does anyone know what these guys might have been doing outside the server? Also how can I improve my lap more than 1 sec like those drivers did when the track is getting heavily rubbered up with 20 drivers or more? Other driver's who tried my set up told me it was well balanced but would not explain to me more than that.