This is particularly common in areas such as the US Gulf coast, where refineries were designed to process Venezuelan and Mexican oil, and in areas such as the US Midwest where refineries were rebuilt to process heavy oil as domestic light oil production declined.
ðɪs ɪz pɚtˈɪkjʊlɚli kˈɑːmən ɪn ˈɛɹiəz sˈʌtʃ ɐz ðə jˌuːˈɛs ɡˈʌlf kˈoʊst, wˌɛɹ ɹᵻfˈaɪnɚɹiz wɜː dɪzˈaɪnd tə pɹˈɑːsɛs vˌɛnɪzwˈeɪlæn ænd mˈɛksɪkən ˈɔɪl, ænd ɪn ˈɛɹiəz sˈʌtʃ ɐz ðə jˌuːˈɛs mɪdwˈɛst wˌɛɹ ɹᵻfˈaɪnɚɹiz wɜː ɹᵻbˈɪlt tə pɹˈɑːsɛs hˈɛvi ˈɔɪl æz dəmˈɛstɪk lˈaɪt ˈɔɪl pɹədˈʌkʃən dᵻklˈaɪnd.