The Oily Maniac

The Oily Maniac or "Oily Maniac" is a 1976 Hong Kong horror science-fiction fantasy monster movie produced by Shaw Brothers Studio, the film directed by Ho Meng Hua. loosely remake of "Sumpah Orang Minyak" an Indonesian horror movie in 1958.
Plot.
Shen Yuan while digging inside an oil from underground hole and turns him to the Oily Maniac monster.