User blog comment:Mr Procrastinator/How often does a car need servicing?/@comment-25255992-20150504190953/@comment-26329136-20150504211446

Actually, the bar does decrease the same for both cars, even at Le Mans.

Le Mans - 1 Lap Cup

DeZir - ~4:15 - 11 bar decrease

Le Mans - 1 Lap Hunter

919 - ~3:00 - 11 bar decrease

The 919 lapped Le Mans 1 minute faster than the DeZir yet both only decreased 11 bars.

The reason why going faster seems to decrease car condition faster is because it's more difficult to stay on the track so you're more likely to go off-track.