Drain 4 qts of oil, remove filter/replace with new one, refill with 4 qts fresh oil per factory ......

Seems pretty straight forward to me.....

 

Should be, but if you have an Evo Softail, the manual will tell you to put 3 quarts into the tank...you can try, but since liquids won`t compress, you can`t squeeze 3 quarts into it. Not every model is the same, so it is not so simple...