So when I got my Xantia last year it could have indeed been filled with Hydraflush and left with it in....interesting!Bear in mind that hydraflush is not green - its an orange (yellowish?) colour, so you may already have a bit of hydraflush in your car...and going from hydraflush to LHM won't give a pure green colour due to the blending of 10% of orange coloured liquid.
Hydraflush.
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We had the hydracleanse discussion on the old forum. The problem is that we dont really know what it contains.
But surely its very similar to LHM in properties - it needs to be.
Note : A flushing does not mean literally that you flush a surface clean. In many situations a flushing is simply a shift from one type fluid to another type of fluid wetting components internally. This may take time according to fluid properties - as the LHM fluid film may be very durable. The "old" fluid film may contain all kinds of foreign matters - like any kind of dirt trapped in a greasy film. The theory then is that you flush out the dirt by shifting the fluid. And it works well.
IMHO the time/mileage limit for leaving the hydracleanse in the system is down to a limited "performance" of the hydracleanse fluid. I.e. the viscosity may not be temperature stable, and the lubing properties shifted towards flushing properties.
The time/mileage limit for the hydracleanse to possibly be a damaging fluid for the hydraulic system is a hypothetical limit. It was never thought as a hydraulic fluid and should therefore not be used as so. On the other hand it can not be directly harmful for the system - as this would show within the "allowed" limit for the fluid usage.
I'd say prolonged usage of the hydracleanse would simply degrade performance - i.e. the hydraulic system may perform weird on hot or cold temperatures - and *may* cause accelerated wear on seals and sliding parts.
But surely its very similar to LHM in properties - it needs to be.
Note : A flushing does not mean literally that you flush a surface clean. In many situations a flushing is simply a shift from one type fluid to another type of fluid wetting components internally. This may take time according to fluid properties - as the LHM fluid film may be very durable. The "old" fluid film may contain all kinds of foreign matters - like any kind of dirt trapped in a greasy film. The theory then is that you flush out the dirt by shifting the fluid. And it works well.
IMHO the time/mileage limit for leaving the hydracleanse in the system is down to a limited "performance" of the hydracleanse fluid. I.e. the viscosity may not be temperature stable, and the lubing properties shifted towards flushing properties.
The time/mileage limit for the hydracleanse to possibly be a damaging fluid for the hydraulic system is a hypothetical limit. It was never thought as a hydraulic fluid and should therefore not be used as so. On the other hand it can not be directly harmful for the system - as this would show within the "allowed" limit for the fluid usage.
I'd say prolonged usage of the hydracleanse would simply degrade performance - i.e. the hydraulic system may perform weird on hot or cold temperatures - and *may* cause accelerated wear on seals and sliding parts.
Anders (DK) - '90 BX16Image