Find out how much
oil your pan holds. Then pour that amount into the engine. Check your dip stick after ten minutes or so. Drain down time.
I have remarked some dip stick with an engraving tool and some I have cut off to move the full mark. You note where the
oil is on the stick. If you cut the stick then just measure where the full mark is and where the
oil shows on the stick.
If you need to add length it's a bigger problem. I did weld two sticks together one time but with an after market unit just try to find a new one that is longer. Or use the engraving tool.
Once you have the oil matching the full mark on your dip stick then crank the engine for a couple of minutes, shut it down, let the oil drain back into pan, check the dip stick and add what oil you need to bring it back to the full mark.
When you change oil you don't generally drain the remote lines or a cooler. If you have a 5 qt pan with a remote filter you will need about 6 to 6 1/2 qts.
I have removed a pan and pour a measured amount of water into till it reaches full point in the pan so I would know how much the pan holds. Dry out the pan, install it onto the motor to remark a dip stick. But a stock pan you should be able to find out hold much it holds.
Check Ebay and read the ads. Watch out because some ads list the pan amount with the oil filter included.
IMHO
Dwight
hope this helps