I used Amsoil in my 2022 3500 6.7 engine for the first time, now I want to get a sample to send to a lab for analysis . The issue that I'm having is , I'm trying to push a vinyl tube down the dip stick tube but it gets hung up about 5 inches from reaching the oil in the pan. It seemed like such a simple way to do it but its just not working. Any tricks or other ways to get a quick oil sample with out removing the drain plug?