At Smart Earth we're your source, for a happier horse :)

Summary: In this paper lubricating properties of rapeseed and camelina oil esters have been compared. Dependency of the electrical resistance and friction coefficient of the lubrication surface using different types of fuel was analyzed. It was stated that the highest electrical resistance occurs when lubrication is done with diesel fuel, whereas the friction coefficient is the lowest at lubrication with camellia esters.

Link: http://connection.ebscohost.com/c/articles/94847937/impact-acid-number-fuels-wear-process-apparatus-fuel-injection-diesel-engines