Oleophobicity can be thought of as an extension to hydrophobicity; it works using the same principles though it is more difficult to impart. Oleophobicity describes how oils interact with a surface, and tends to imply that a surface rejects oils from it. Oils are not just limited to engine oils, cooking oils and oil for fuel; many food products are oil-based, and dirt that stains textiles often contains oils. As such, modifying the way textiles interacts with oils is very important.
Surface Energy is fundamental to how oils interact with textiles, and modifying this is important to obtaining the best oleophobic properties.
In some regards oils can be thought of as the opposite to water, but despite this, oleophobic surfaces also tend to be hydrophobic. There are a great deal of techniques used to make a surface oleophobic, though most rely on either roughening a low energy material or imparting a rough material with a low energy surface.
Recently, oleophobic and hydrophobic surfaces have gained widespread public interest because of online videos that show seemingly incredible results. For example, NeverWet make a superhydrophobic product that is also oleophobic. Their Youtube video has been watched over 3 million times