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Shotlist:Hydraulic oils in many languages - looks like it was taken from earlier film - uses of water-based hydraulic fluids versus mineral oil based fluids. goes through characteristics of good oils one by one - examples of machinery that use each type of oil, the additives for each oil and how that oil is tested. viscosity shown through lots of demonstrations and cold weather versus hot weather/temperature. different kinds of equipment need different kinds of oils. oxidation under high pressure and temperature, so stability is an issue. (oxidation thickens oil and leaves a sludge); good refining and how it affects production of hydraulic oil - the three separate refining processes. oxidation stability tests - small supply tanks, high pressure, etc. container handling equipment is stressed - how oils reflect this. evaluating wear on gears, pumps, etc. contamination with water and air, foaming corrosive properties; solid contaminents from dirty environments - filtration; Thames Flood Barrier footage; list of companies