If you are the C/E, what would be the best course of action that you would do? (Please read the following.)?

) A C/E is having a problem with his Main Propulsion Machinery since it has a very high fuel consumption compared when the said Propulsion machinery was brand new. His 2/E tells him one day that a probable cause might be the improper combustion of the fuel on the cylinders 1 and 5. One day, they decided to pull out the injectors at cylinders 1 and 5 and they found out further that the said injectors delivers the correct amount of fuel, however the viscosity and spray pattern was not at the optimum. If you are the C/E, what would be the best course of action that you would do? Support your answer and support any course of action that you would do if necessary.