Originally Posted by SouthArk370Z

You're overthinking this. Remove about a half-pint of oil into a clean container. Check the stick. If you took too much out, pour some back in (aren't you glad you used a clean container?). Repeat until level is 25-75% (edit: or whatever you fell comfortable with) between the dots. Just about every hardware store sells siphon bulb pumps (think squeeze bulb on blood pressure cuffs) for ~$5. You may need to get some smaller outside diameter (OD) tubing to fit down the dip tube.