Xantia sinking more with Hydraflush in system

[charentejohn]

Just in the middle of a hydraflush (700mls, only another 300 to go) and I noticed the car tends to settle more over the course of a few days if not used.
Probably normal as the flush is thinner ? than LHM so would seep past seals more ?

After fitting hydraflush and bleeding everything car runs well and Stop light which used to take 20 secs+ to go out after standing a few days now take 2 secs max.
When hydraflush first fitted if left for 3 days the car would sink a couple of cm or so, when parked rear wheel arch is above the tyre by about 2cm and after the 3 days just below the tyre.
After 1000km of hydraflush now sinks to well below the tyre, about 4cm of sinking instead of 2 and a bit cm.

I assume this is normal and when I fit the new LHM it will return to only sinking about 2cm if left for a while.
Not worried, just curious. Then again if flushing has found a weak spot I may as well fix it now.

[addo]

Its viscosity when cold, is much less than LHM Plus. Your observations probably reflect this aspect.

[charentejohn]

Thanks Addo, nice to have it confirmed. Not so hot here at the moment so a bit of extra sinking over time not a problem.
I am still offering lifts to anyone who wants to go a fair distance so I can put the green stuff back in.

[Hell Razor5543]

Hydraflush is also less 'greasy' than LHM, so it must not be used for more than 3,000 miles, otherwise things can start to bind.

[charentejohn]

No problem, I am struggling to put the miles on the car so as soon as it hits the 1000 miles I will change it.