The FSS appears in the odometer display.

When service is required one of three possible icons will appear beside the odometer reading.

One wrench (Service A)
Two wrenches (Service B)
Clock with a wrench (Time-based service)

To find out how much is left on the counter, turn the key to the on position and within 5 seconds push the trip reset button twice. The wrench icon will appear together with a number which is the miles left to service.

It is written up in your manual in the Instrument Panel section I believe.

Hopefully, your service people reset the system when they changed your oil.

There are several articles that have been written about poor oil changing habits in the US despite improvement in engine oil technology. Most service centers still say 3,000 when most synthetics don't require oil changes for 7,000 or more.

Oil manufacturers don't really want to say anything of course, they sell more oil. Car manufacturers don't really want to **** off the oil manufacturers, so they don't say anything. There is money to be made by the mechanics so they don't really say much either.

Engineers? The public rarely hears from engineers.

Unlike the oil change indicator in GM cars and other Chrysler models, the FSS is supposed to take into account driving conditions, engine temperature and other parameters.

If you haven't read about how to use the FSS, you probably don't know about the oil level indicator too, that's pretty darn useful and apparently, more accurate than the dipstick. The manual talks about that too.