When I first got my CS4 I turned the grease knob every 4-6 hours, as recommended in the initial blogs
I since have read that 6 hours is much too often and have backed off to every 10-12 hours
The machine currently has 70.9hours on it and has been (fingers crossed) trouble free.
At 70 hrs I cleaned out the burst disc area even though the dead head test was right on spec.
Over this time period I have filled 4 bottles (smallest 60 minute) from empty and now top them up as needed only when the relative humidity is low
I also fill guns.
I use the bottles when the RH is high and fill/refill when the RH is low
That's my story and I'm stickin to it
just my 2 psi
Edward
PS
FWIW
In my younger days I used to turn the grease pot alot