What is the LED Bar Graph?

[M1C8A3L]

Hello everyone,

I have read a couple of past posts about the LED bar graph that shows up in the instrument cluster and learned that this shows the oil life. However, I have recently changed my oil and that has not restored the left-most green light and the yellow one that used to be on.

My questions:
1. What exactly does this bar graph indicator really mean?
2. Should I be concerned that the two lights haven't been restored after having an oil change?
3. Where is the easiest/cheapest place to get a manual so I don't have to waste your time asking dumb questions?

Thanks for your time,

Mike

P.S. My ti is a 1997 (manual)