What kind of oil does Wendy fry their food in?

Unfortunately, Wendy's doesn't publicly disclose the specific type of oil they use for frying.

While it's likely a blend of vegetable oils, the exact formulation is a trade secret. They do, however, make sure the oil meets certain standards, including being trans-fat free.

If you're interested in specific details about their ingredients, you can always contact Wendy's customer service directly.