After about 1990, all Mini engines used an external oil pipe with rubber ferrules that are known to leak or blow out in heavy use. You can avoid risk of oil pressure loss by converting to this stainless braided hose. Designed for engines after 1992 with 11/16" UNF oil pump outlet and 11/16" UNF filter head inlet, which will be marked LPX10026 or LPX10027 on the casting.
Please check thread sizes and filter head casting before ordering. See also MOC1019, MOC1020 and TAM2106-HD for alternative applications.