These posts are beginning to look like spam for some snake oil... Here is the test for water in PAG oils: http://www.autoacforum.com/messageview.cfm?catid=20&threadid=17571 That .edu paper is not particularly applicable to the real word, like much of ,edu POE oils are miscible with both R12 &am...

I have never seen a PAO that was miscible with 134a. PAO is ok with R12 & HC's 134a should use PAG, or if you want a substitute POE. DEC PAG oils are not hygroscopic, so there is no reason to fear them. My understanding is that the POE oil has no benefits over the PAG more than it is not conduc...

Hello! Im doing a big service on the ac system, and thinking about filling it with PAO 68 oil from manufacturer Hella. Originally the system is filled with ND8 oil, witch according to denso is equivalent to double capped PAG 46. The PAO 68 oil is, according to Hella, said to have the benefits of bei...

I worked for Delphi- the compressor supplier to GM for many years- we always used mineral oil on all o-ring joints and threaded connection- with both R-12 and R134a applications. The assembly plants did likewise. The small amount used would never cause an issue with the integrity of a 134a system. ...

Thank you for answering, but i have asked several mecanics that tells me to not use mineral oil because of incompatibility with R134a and ND8. The mineral oil will cause layer between the ND8 oil and risk of insufficient lubrication and damage to the compressor. Then when I tell them about the poten...

Hi! Erik here from Sweden, i have an Camry 2.2L from 94. I decided to fix the ac system. New expansionvalve, new condenser, new drier, new seals everywhere (compressor too). Now, i got stuck on what oil to use on the o-ring seals and in the system. Whoever i ask the answer is different, if they have...