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pag oil
Posted: Thu Aug 05, 2021 9:00 am
by penguins25
I got about 4oz of pag 46 left in a small bottle
its been sitting out for a while now
is it good to put into the system or do i need to use a fresh sealed bottle
Re: pag oil
Posted: Thu Aug 05, 2021 9:31 am
by tbirdtbird
It absorbs moisture.
You answered your own question
Re: pag oil
Posted: Thu Aug 05, 2021 11:43 am
by penguins25
so i guess the same goes for vacuum pump oil?
Re: pag oil
Posted: Thu Aug 05, 2021 2:28 pm
by tbirdtbird
Not to the same degree, but it does absorb the moisture in the system you are pumping down.
I do not worry about the QT bottle of vac pump oil I have on the shelf, even if I used some and then re-capped it (never leave the caps off!)
But to achieve a good vac you should change the vac pump oil periodically. It does make a difference. There are HVAC (residential and commercial) that will change the vac pump oil out each time they use it, but they are dealing with a much larger capacity system