Does McDonald's's use beef oil

Answer 1

To answer your question, I will have to break down your query into fragments so that the information isn't broad-based and worthless.

Firstly, "beef oil" does not exist because beef fat is solid at room temperature. To directly answer your question, McDonald's has and never has, used "beef oil". It has however, used cottonseed oil infused with beef tallow for the purposes of frying.

If you are referring to the modern (2012) frying process, the answer is 'no', since McDonald's has switched their formulation of oil almost a decade ago. They used to use cottonseed and beef tallow, but they have long since phased that out.

If you are referring to the use of beef fat or other rendered forms of beef fat in the cooking process, then the answer is yes, depending on what items on the menu you are referring to. Burgers with beef patties for example, will have beef fat present in it naturally, with grease present in it that you might refer to as "beef oil". Beef fat however, is not added to the cooking process otherwise than what is present in the meat.

If you are referring to non-beef products on their menu, then the answer is no, they do not add beef extracts to other items on their menu.