How much fluids does a car consume over a year for each of the different fluids?  

From our experience with a 2004 car, using the specified engine oil 5w40 full synthetic we find about 0.5L at each 6 month oil change.  Ie we put in 4L each time but the last time the drain was 3.5L.  

Re: power steering and brake fluid how much is that?  I read that a car might carry 1L of brake fluid.  I noticed someone's car the power steering fluid reservoir was empty (car drives fine) there is a hole which the dipstick goes inside and that was on the low side.  Have to double check tomorrow as the drive way is up a slope.  Because often, some people don't pay for a garage to do the servicing, they might change the engine oil/filter but the other stuff are not looked at.  The mechanic also might not bother to check the fluids if one just ask for a WOF.  From the people I know, I rarely hear people who buy brake or power steering fluid from Repco.  Often they might get a car from Turners Auctions and they use it for maybe 10yrs, they only change the engine oil/filter and then any other issues that comes up then they take it to the mechanic, brake pads, a squeaky belt etc ... So if the person does not take notice of these fluids after 5 or 10yrs of use how much fluids are consumed?  Also, it is not known cars that come from a NZ caryard or from Japan as an import, how much care those owners did and if they did any top ups or fluid flushes.  

:)