I have been adding about a tablespoon of buckyballs to my motor oil for over 5 years and have a consistent gas mileage increase of over 5%. There has been no engine damage from it. It doesn't dispurse well if just added to oil initially. It has to run through the engine. I have cut apart a used oil filter and it does not clump up in the filter.
I think that, being carbon, the sheets would tend to burn up and go away with the combustion cycle . As the graphene flakes are applied to a surface by "sprinkling on", the stuff would have to be replaced by removing the head to expose the cylinders.
El_Nose
Apr 26, 2013