what kind of vinegar does subway use

Subway uses red wine vinegar as the type of vinegar on their sandwiches. It is typically a 5% acidity red wine vinegar, sometimes mixed with olive oil to create their signature oil and vinegar dressing. Subway even has branded packets of red wine vinegar specifically produced for their use. Although the exact commercial brand is not publicly known, it is clear that Subway relies primarily on red wine vinegar for the vinegar component in their sandwiches and dressings.