Where I work, we get brake parts cleaner in 55 gallon drums. All of the labels have been removed, however, this seems to be a similar product. http://docs.google.com/gview?a=v&q=cache...pdf&hl=en&gl=us I know that a few engine cleaners use naphtha as a solvent to break down deposits in the engine, but what would you think about using this as a quick flush before doing a service? It blends with oil really well and doesn't seem to reduce the lubricity of the oil when rubbed between my fingers. It also does a really good job of breaking down hard carbon on engine parts that are being cleaned before reassembly.