what is friction modifier?

A friction modifier is an additive that reduces the amount of friction between two surfaces in engine oils and automatic transmission fluids. These products are used to help improve fuel economy and extend engine life.

Friction modifiers are commonly found in many different applications including aerospace, over-the-road and off-road transportation, food machinery, shipping and boating, metal shaping, and oil exploration and recovery. They are also important in industrial lubricants that require high operating temperatures and prevent rusting.

How does friction modifier work?

In general, friction modifiers are derived from low molecular weight, surface active oligomers and act as boundary lubrication agents. They prevent solid surfaces from coming into direct contact, which dramatically reduces friction and wear.

Among the most common friction modifiers in use are organic friction modifiers, oil soluble organomolybdenum friction modifiers and functionalised polymers [1]. They all have different properties that can be used to increase the performance of engine & transmission fluids by reducing boundary friction.

As engine lubricants continue to become more sophisticated, the need for robust friction modifiers has increased. This allows a wider range of components to operate in thin boundary lubrication conditions, which results in improved performance and efficiency. In addition, the use of temperature-dependent extreme pressure (EP) additives has become increasingly common in lubricants that create a more efficient operating environment by allowing metal parts to move under pressure without causing premature wear and damage.