User blog comment:Mr Procrastinator/How often does a car need servicing?/@comment-116.50.57.180-20160216043234/@comment-26329136-20160216054034

You're right, I got the units mixed up. It should be 0.8 'bars' per kilometer driven. The rest of the values are calculated using 0.8 'bars' per km so they're still correct.

Driving off-track results in a rougly 600% increase in damage taken compared with driving on-track (0.8 'bars' per km when driving on-track compared to 5.6 'bars' per km when driving off-track). That would mean around 180 meters per 'bar'.