If the oil life moniter was correctly reset when the last time the oil was changed then as the car is driven and miles and time count up the life of the oil is being counted down as the oil gets dirty and needs to be changed again, 0% and it's time to change the oil and 100% it's just been changed and your good to go. number of cold starts miles of stop and go and not st much highway miles fully warmed up. The easy things like fully warmed up and not under high load are easier on the oil than ideling in stop and go traffic and then even worse many short trips not allowing the engine to fully warmerup these things make the moniter of the oil life count down quicker.
Its getting to be time for an oil change. don't wait for 25% oil changes are cheap, engines are expensive
How to Reset the CHANGE ENGINE OIL Message
1. With the ignition key in RUN but the engine off,
fully push and release the accelerator pedal slowly
three times within five seconds.
2. Turn the key to OFF.
If the CHANGE ENGINE OIL message comes
back on, the engine oil life monitor has not reset.
Repeat the procedure.
You can also download a PDF version of your owner's manual for free.
2000 Pontiac Montana Owner's Manual
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