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Surfactant injection using sodium ligno-sulfonate (SLS) from bagasse is one of the innovative efforts with a green chemical process. This surfactant is made from bagasse. With the green chemical process, the bagasse waste is used as an SLS surfactant. Surfactant injection is carried out in an effort to increase the oil recovery to produce the remaining oil, with the mechanism of reducing the interfacial tension (IFT) in the reservoir. There are three types of crude oil used in the surfactant injection test, light crude oil, intermediate crude oil and heavy crude oil. Light crude oil has Carbon number 1-15 (? 40 - 50 oAPI ), intermediate crude oil has a Carbon from 15-50 (? 15 - 40 oAPI ) while heavy crude oil has a Carbon number of more than 50 (? 9 - 15 oAPI ). Each type of crude oil has been tried to inject the surfactant. Surfactant injection using SLS surfactant synthesized from bagasse with Berea cores in the injection process to minimize impurities so that the natural performance can be known. SLS surfactant synthesized from bagasse has a molecular formula (C11H16O8S)n, which means it has element C of 11, element H is 16, element O is 8 and 1 element of S. The symbol n indicates the monomer of the molecular formula of the compound. Core flooding with SLS surfactant synthesized from bagasse resulted in an increase of 10% oil with microemulsion 6% - 10% in light crude oil with carbon number 8.29 which from fields with brine 8,110 ppm, with crude oil from Tempino (Jambi field, Sumatera, 42 oAPI). Use of an intermediate crude oil (Prabumulih field, Sumatera, 30 oAPI) or heavy crude oil (MOI crude oil, from Papua, 10 oAPI) does not produce microemulsion, so use of surfactant injection it is not effective.. Thus the success of surfactant injection with SLS surfactant synthesized successfully depends of the Carbon Number similarity between surfactant and crude oil, so that the carbon number is one indicator of the success of SLS surfactant injection in the EOR.