2003 XK8 PS Dipstick read??
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Joined: Aug 2013
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From: Poughkeepsie NY
Quick search, this would apply to PS as well
A feature of brake fluid not commonly recognised is that it deteriorates over time. The main reason for deterioration is that brake fluid is hygroscopic, that is, it absorbs moisture from the air.
Because of the heat produced by friction when brakes are operated, brake fluid is designed to have a high boiling point, typically about 265°C / 509°F. Any moisture absorption could find this temperature reduced to a mere 140°C / 284°F over a period of two years. At this level, any period of sustained braking could produce enough friction to bring the fluid to the boil, where it vapourises, leaving the driver with little or no brakes.
Unlike engine oil which should be changed according to the distance driven, brake fluid deteriorates not with distance but with time. It continues to absorb water even when the vehicle is stationery. Most vehicle manufacturers recommend regular brake fluid changes on a time basis, e.g. every year. Unfortunately, such recommendations are not always followed and independent surveys have shown that many vehicles have dangerous brake fluid in them.
A feature of brake fluid not commonly recognised is that it deteriorates over time. The main reason for deterioration is that brake fluid is hygroscopic, that is, it absorbs moisture from the air.
Because of the heat produced by friction when brakes are operated, brake fluid is designed to have a high boiling point, typically about 265°C / 509°F. Any moisture absorption could find this temperature reduced to a mere 140°C / 284°F over a period of two years. At this level, any period of sustained braking could produce enough friction to bring the fluid to the boil, where it vapourises, leaving the driver with little or no brakes.
Unlike engine oil which should be changed according to the distance driven, brake fluid deteriorates not with distance but with time. It continues to absorb water even when the vehicle is stationery. Most vehicle manufacturers recommend regular brake fluid changes on a time basis, e.g. every year. Unfortunately, such recommendations are not always followed and independent surveys have shown that many vehicles have dangerous brake fluid in them.
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