I believe the water injected turns to steam. Steam cleaning has some use on Carbon.

Will it tackle vegetable oil residue? I just do not know. I do suspect it has to be chemically attacked with a solvent. Dissolved and washed out.

Adding a bottle of marvel mystery oil to the engine oil can help this situation. If it is going anywhere with a soak. A small amount will get on the cylinder walls adding the solvent into the ring lands.


Takes substantial miles though and prior indications have to be the earlier soak down really did help the compression.