I checked my oil today, and from the bottom of the dipstick to the minimum marker, I'd say it was about half way or three fourths to the bottom marker. I added a pint because that was all I had. It just put it to the minimum marker, I think. It was hard to tell because it was dark. Have I already done damage to the motor by it just being low and how long can I drive with it on minimum since I'm due for an oil change next week?