The FSS (oil life monitor) must have more to it than a simple countdown / RPM levels / temps , etc. I just changed my oil ....before the change the FSS still said there was 1400 miles left....drove about 30 miles & when I got home & went to reset the FSS.....it already had changed to read 2200 miles left...before I reset it back to 7000.
I'm thinking there must be a device in the system that also checks oil viscosity or electrical resistance.
Anyway, I always change it at about the 7000 mile mark & the FSS always has from 1400 to 2000 still showing.
Bought the oil & proper filter cheap & found a garage that does the labor for <$13......total runs about $75 every 7000 miles.....
Fred's all happy after he gets fresh oil!!
While he was up on the rack I took a look at the steering stabilizer...(40,300 miles) ....no leaks/complaints yet....looks like a real snap to change yourself when the time comes....