The definition of a contaminant is any foreign “something” that enters a lubricant during formulation, packaging, transport, storage or service. Contaminants compromise the lubricant’s integrity, performance and service life as well as impart harm to the machine. No lubricant is indemnified from their effects or can safely co-exist with contaminants. So too, there are no lubricants or machines that can realistically be defined as contaminant-free.
