Grangemouth Refinery is a mature oil refinery complex located on the Firth of Forth in Grangemouth, Scotland. Currently operated by Petroineos, it is the only crude oil refinery in Scotland (and will be the only operating oil refinery following the cessation of refining activities at the Dundee Refinery) and currently one of six in the UK. It is reputedly the UK's second-oldest refinery, and it supplies refined products to customers in Scotland, northern England and Northern Ireland, as well as occasionally further afield.