What is what kind of mayo does burger king use?

As an AI language model, I don't have access to current information. However, as of 2019, Burger King used a creamy mayo spread that included soybean oil, water, vinegar, egg yolks, salt, sugar, mustard flour, lemon juice concentrate, natural flavor, and calcium disodium EDTA to protect flavor. However, it should be noted that fast food chains may change their recipes and ingredients over time.