The other day my service light came on, not the check engine light. The car seems to be driving fine, no change in drivability. Checked all fluids and they seem to be right where they belong at the correct levels. The only thing that might be different is the fuel consumption may be a little more but not by much at all. Any opinions on what could have caused the service light to come on and not the check engine? Car just hit 60,200 mi.