My service light on the RPM gauge came on for a brief 3 seconds.
There is 900 miles left on the service counter but it does say "Service".
Should I make an appointment now? or Wait until 0 Miles left.
Will I get denied?

 

Make the appointment. They'll perform the service once you're within 1k miles.

 

Ok! Thanks for the Fast Reply.

 

My pleasure to assist.