How long from yellow to red bar?

[dkl]

How much fuel does it need to consume before the yellow service bar will turn into red? I know that it is about 650 liters per green bar...so is it also true for the yellow bar? The reason I'm asking is that I'm currently about 550-600miles away from home when I saw the yellow inspection 1 light come on. So, I would rather have the service done when I get home. Will it turn into a red bar during these 600 miles of highway driving (assuming that I'm averaging 19-20mpg)? I'm not too concern about the engine oil/filter as I just swapped it out about 3k miles ago...My only concern is that BMW may use the "driving too long with a red bar indicator" excuse to void my warranty if this ever come up in the future. Any suggestions? Thanks.