Catalytic pyrolysis is a combination process of fast pyrolysis in the presence of catalyst. The process capable to break the complex petroleum hydrocarbon into smaller compounds. It is known as a promising technology to convert waste from fuel oil blended stock (FOBS) into useful products such as bio-oil. FOBS could serve as one of the potential sources to produce fuel. FOBS known as a blend of residue oil, mixed-oil and incomplete oil forms a complex structure featuring toxic and hazardous compound creating risk towards human and environment. However, it still contains certain extend of precious hydrocarbon. In order to tackle the problem, thermochemical conversion was suggested and catalytic pyrolysis is hypothetically a reliable process for producing bio-oil from waste such as FOBS at temperature between 400-650 ºC. The reaction is oxygen-free process as the process operate at elevated temperatures in the absence of oxygen and is cost-effective and at the same time able to produce high yields of valuable products by turning waste into valuable hydrocarbon range bio-oil. High quality bio-oil produces in C4-C20 range will be mainly consisting of gasoline and diesel like product. In this array, bio-oil has the potential to serve as a perfect alternative fuel source, lowering the need for fuels derived from unrenewable petroleum. The aim of this review is to discuss the state of art transformation of FOBS by catalytic pyrolysis to produce bio-oil from recent literatures based on the reviewed the presence of bi-metallic catalyst gives a high yield of bio-oil and in the range of valuable fuels. A variety of metals need to be studied in the future in order to get good results, highlighting the study's deficit.