Originally Posted by Yokomo_Ant3

15000 made the car have a much more corner speed and steering, especially into and out of corners. It also had a lot more forward traction, I did try 20000 also but that was a little too difficult to drive. The lowest diff oil I tried at HUGE was 5000, higher grip we always use heavy oil, as lighter oils "diff out". In Australia I Generally run anywhere from 2000-10000 depending on track grip

Antoni