When you go to most dealer parts departments as a consumer, you usually get the idiot parts guy who only deals with customers. They usually only sell wipers / touch up paint etc.Ask someone in the parts department.
Sometimes you’ll get a parts department that doesn’t have a designated customer counter person. In that case you can usually get reliable help.
When I worked at jeep we had to tell the parts guy what fluid we needed as there were so many special fluids in jeep and Chrysler truck rears, transfer cases, and manual transmissions. They were clueless as to what was supposed to go in and how much.