REGARDING MISCIBILITY IN HYDROCARBONS: Kolor Kut gasoline gauging paste is the only gasoline paste approved by the US Military. It is designed for gauging levels of hydrocarbons. It should always be applied "sparingly" direct onto a dip stick or dipping tape at about the point where the level is expected. As a contact product it would usually instantaneously change from pink to red on contact with hydrocarbons. Heavy oils require a few seconds of contact. It is a one off action paste and repeat dips will require a fresh application of paste. Low levels of paste are miscible with hydrocarbons.