I have converted all of my R-12 systems and my friends systems to Duracool 12a. Even changed out a R-12 to 134 conversion to Duracool with better results. By converting I mean just changeing the refrigerant, nothing else. I've even topped off Freon w/ Duracool with no problems. Lower head pressures and cooling at idle than 134. Dang near identical to Freon performance! Compatible with all refrigerant oils. All of us are happy and cool!!!
And just so everyone knows I do label my systems as "serviced with Duracool 12a" so as to not contaminate a shops recovery system. However i do my own work and would only be an issue if myself or my friends sold their cars!
I don't want to hear any flack about flammability issues as 134 is flammable too AND produces toxic fumes when burning. Besides all fluids in the engine bay are flammable anyway! Duracool is a hydrocarbon refrigerant.
www.duracool.com
I buy from Fox Tool & Supply Madison, TN (615)865-6251
Sorry if I got on a soap box!!! I just really like this stuff!
DanC