This additive component is part of the PI package in the oil and is attracted to metal surfaces by strong forces, which can be as high as 13 kcal/mol. On the molecular-surface level, the hydrocarbon tail is left solubilized in the oil, while the polar head is anchored to the metal surface, and both are perpendicular to the metal surface. Furthermore, this leads to a multi-layer matrix of molecules that are difficult to compress but very easy to shear. What do we call this additive component? Guidelines for the Question of the Day: 1. No Piston Cup Lapel Pin will be awarded to the same person within 14 days of a previous award. 2. Please respond with a complete sentence. 3. Please do not post links. If a question arises as to the need for clarification, then sources and links may be requested. 4. Please, no off topic posts.