H FC s ). ▁Al ong ▁with ▁R - 1 3 4 a , ▁PO E ▁oil ▁is ▁recommended ▁as ▁a ▁replacement ▁for ▁R 1 2 ▁min eral ▁oil ▁as ▁R 1 3 4 a ▁does ▁not ▁mix ▁well ▁with ▁min eral ▁oil . ▁These ▁w ax - free ▁o ils ▁are ▁suggested ▁for ▁use ▁with ▁ch lor ine ▁free ▁H FC ▁systems ▁as ▁they ▁provide ▁better ▁lub ric ation ▁and ▁stability ▁and ▁are ▁more ▁mis cible ▁with ▁H FC ▁re fr iger ants . ▁They ▁can ▁meet ▁the ▁lub ric ity ▁requirements ▁to ▁those ▁of ▁min eral ▁o ils ▁used ▁with ▁C FC s ▁and ▁H FC s . ▁They ▁are ▁compatible ▁with ▁most ▁lub ric ants ▁in ▁the ▁market . ▁It ▁is ▁noted ▁that ▁the ▁vis cos ity ▁of ▁the ▁oil ▁decre ases ▁with ▁temperature . ▁The ▁disp ersion ▁behavior ▁of ▁this ▁oil ▁has ▁also ▁been ▁the ▁subject ▁of ▁a ▁lot ▁of ▁study . ▁It ▁is ▁also ▁considered ▁by ▁some ▁to ▁be ▁a ▁good ▁add itive ▁to ▁engine ▁oil . ▁ ▁Use ▁The ▁use ▁of ▁this ▁type ▁of ▁oil ▁is ▁in ▁the ▁process ▁of ▁being ▁ph ased - in ▁by ▁manufact ur ers ▁who ▁use ▁compress ors ▁in ▁their ▁products . ▁ ▁The ▁need ▁to ▁replace ▁the ▁old ▁o ils ▁has ▁ar isen ▁due ▁to ▁environmental ▁restrictions ▁causing ▁in compat ibility ▁of ▁the ▁old ▁o ils ▁with ▁the ▁new ▁re fr iger ants . ▁ ▁PO E ▁o ils ▁are ▁very ▁good ▁sol vent s ▁and ▁easily ▁dissol ve ▁most ▁of