With the correct oil, friction losses in an engine are reduced to a minimum. This is done by taking into consideration circumstances as engine usage, ambient temperature, time of year and climate, location and engine design. The engine manufacturer usually recommends a certain type of oil to use taking these circumstances into account.
Engine oil contains additives known as friction modifiers/reducers and anti wear additives which are soluble and are used in the lubrication industry for many years now.
Certain additives created from zinc or molybdenum are known to be beneficial for protecting sliding surfaces from wear and premature failure. Research has been carried out to investigate these properties and improve engine oils. The next document is published by Nature Research.
Although mainly used in the automotive industries, aerospace applications can use these products too with the same good results!
Excerpt from the document:
This study compares the tribological and thermo-physical features of the lubricating oil using MoS2 and ZnO nano-additives. the average size of MoS2 and ZnO nano-particles were 90 nm and 30 nm, respectively. The nano-particles were suspended using Triton X-100 in three different concentrations (0.1, 0.4 and 0.7 wt.%) in a commercial diesel oil.
To continue reading see the pdf below: