User blog comment:Quiksilvr/The date-time synchronisation error and what you can do about it/@comment-26338036-20150726232933/@comment-26793627-20150727002734

Granted! your point is valid in context of users who are on Android, since I believe that it lets you employ a maximum of 03 mechanics at a time. So for those of you, yes, race the three cars that you want serviced instantly. And then, once you go online and sync with the server, you'll free up the mechanics instantly, ready to service three more cars.

iOS users, on the other hand, have no limitations as far as number of available mechanics are concerned and, as far as I know, have unlimited servicing capabilities. So, for them, they can choose to race as many cars as they like. :)