Probably the most significant addition to space lubricants is a polyfluoralkylether called Fomblin Z25. The fluid has the very high viscosity index of 345 and a vapour pressure that is suitably low at room temperature.
The Bray Oil Co in the USA have distilled the Italian raw stock (Fomblin Oil) to make Bray 815Z, which has been flown on a number of USA satellites mostly in the form of a PTFE thickened grease, Bray 3L38RP.
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