> hydraulic oil whereas other companies either haven't bothered, or haven't > engineers at Pentosin managed to reduce the effect of temperature on their
> G002000 (at least no oils that I have found yet). > benchmark and likely why no other oils "meet or exceed" the specs of > whose viscosity changes less over a temperature range. > understanding is that a higher viscosity index (VI) indicates a fluid > the effect of temperature change on the viscosity of a fluid. > The 'magic' of G002000 appears to be the viscosity index which indicates > Maybe I should have stopped right there, but I didn't as I was curious. > I did not find 1 single manufacturer who cross referenced to G002000. > using Mobil XXXNNN because they are the same thing. > tells you to use only product CAT NNXXXNN, but there would be no harm in For example Mobil XXXNNN meets or exceeds the requirements > reference the spec's on their products, to the spec's from other > In my research I found that virtually all oil manufacturers cross Those viscosity figures now make sense to me, thanks to info from the web > point greater than -60C, a viscosity index of 340, viscosity of less than > You must agree that you don't need G002000. > website) They labeled this product G002000. > range, as I found out thanks to other listers), viscosity of less than > 340 (which means it will not change viscosity much over a given temp > flash point of 130C, Pour point greater than -60C, a viscosity index of > Audi spec'd a fluid that is mineral based, with a density of. > based on the requirements of the system components built by ZF, Girling > Audi specified certain qualities for the hydraulic oil for their systems > better for the experience as I have educated myself. Even if I don't find the "Shangri La of hydraulic fluids" I am > In the process I have learnt a lot about hydraulic systems and oils in > why is the Audi spec'd fluid SO expensive? Audi/VW states that 7.1 and 11S can be mixed if necessary but we suggest draining and flushing the system if you are changing from 7.1 to 11S*** ***Note - this is currently sold as part # G00200 by Audi/VW as of 1990, replacing Pentosin CHF7.1 The CHF11S is correct for Audi/VW 1990 and later models, while Audi/VW 1989 and earlier models can use either 7.1 or 11S although 11S is recommended. Should not be mixed with ATF fluids or other power steering fluids. This synthetic fluid is correct for many later models which specify synthetic fluid. Pentosin CHF 11S Synthetic Hydraulic Fluid - Fully synthetic hydraulic fluid for steering and central hydraulic systems. 1989 and earlier models can use either although the 11S is recommended. As of 1990 Audi/VW is selling Pentosin CHF11S as their part # G002000. ***Note - this was sold as part # G00200 by Audi/VW through 1989. Should not be mixed with ATF or other fluids. Pentosin CHF 7.1 Hydraulic Fluid - Special mineral based hydraulic fluid for use in power steering, central hydraulic and suspension level control systems.
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